Hard Drive Not Writable On Mac

Writing to an external hard drive using Max OS X can sometimes be more complicated than one would assume. Depending on how the drive is currently formatted, and whether or not you want to reformat it, you have a few possible options. If your drive is already formatted for Mac OS X, it is immediately enabled for writing. As soon as I realised what was happening I disconnected the drive, but the partition table is corrupted. I used TestDisk to gather info about the partitions, and tried to use pDisk to rebuild the partition table, but when I try to do that, I get the message that the partition table is not writable, the device is busy. Sep 12, 2020 Writing to an external hard drive using Max OS X can sometimes be more complicated than one would assume. Depending on how the drive is currently formatted, and whether or not you want to reformat it, you have a few possible options. If your drive is already formatted for Mac OS X, it is immediately enabled for writing. Do you have an external hard drive that you cannot write to on your Mac? While most external storage media's default formatting and other setups should make them both readable and writable on most.

  1. Right-click on your external hard drive.
  2. Choose Properties from the contextual menu.
  3. Click on Security > go to Edit.
  4. A dialogue box will appear as Permissions for a new volume (E :).
  5. Click on the Add button > add a new user name > click OK.

Connect the external hard disk to the Mac. Click on Disk utility. Select the drive from the left sidebar, then click the Partition tab. Under Partition layout, select ' 2 Partitions.' The user can adjust the size of the partition based on the desired requirement. Once adjusting based on the desired storage requirement, the user will able to.

Why can’t I change permissions on my Mac?

If you don’t have permission to open a file or folder, you may be able to change the permissions settings. On your Mac, select the item, then choose File > Get Info, or press Command-I. Click the arrow next to Sharing & Permissions to expand the section. … Change the permissions to either Read & Write or “Read only.”

Why does my external hard drive say I don’t have permission Mac?

On your Mac, select the disk, then choose File > Get Info. … Click the arrow next to Sharing & Permissions to expand that section. If the lock at the bottom left is locked , click it to unlock the preference pane.

How do I change permissions on an external hard drive Mac without formatting?

Solution 1: Change permission on external hard drive on Mac with admin privilege
  1. Open the Finder and find your external hard drive in the left sidebar.
  2. Right-click on this drive or volume and choose Get info, and then scroll down to Sharing & Permissions.

How do you change sharing permissions on a Mac?

How to change permissions for files, folders, or disks
  1. On your Mac, choose a file or folder.
  2. Right-click it and select Get info.
  3. Click the disclosure triangle in the Sharing & Permissions block.
  4. Click the lock icon to unlock it.
  5. Enter the administrator name and password.

How do I get full permissions on my Mac?

Apply permissions to all items in a folder or a disk
  1. On your Mac, select a folder or disk, then choose File > Get Info. If the lock at the bottom right is locked , click it to unlock the Get Info options, then enter an administrator name and password.
  2. Click the Action pop-up menu , then choose “Apply to enclosed items”.

How do I fix I don’t have permission to access my Mac?

If you don’t have permission to open a file or folder, you may be able to change the permissions settings.
  1. On your Mac, select the item, then choose File > Get Info or press Command-I.
  2. Click the arrow next to Sharing & Permissions to expand the section.

How do I fix permissions on my Mac?

To repair your permissions using the Disk Utility:
  1. Choose Go > Utilities.
  2. Double-click Disk Utility.
  3. Select the volume in the left pane for which you want to repair permissions.
  4. Click the First Aid tab.
  5. Select the volume to which you want to install the Adobe application, and then click Repair Disk Permissions.

How do I get permission to access my external hard drive?

  1. Open This PC > Right-click inaccessible external hard drive > Select Properties.
  2. Go to Security > Click Advanced > Owner.
  3. Click on Edit > Click your username under Group or username. Check all boxes under Allow column > OK > Apply;

How do I change permissions on Seagate external hard drive?

Click “Everyone” from the top “Group or User Names” section to see the global permissions assigned for the Seagate drive. These permissions are listed in the lower Permissions section. Alternatively, click your username, if it is listed, to see your personal permissions.

How do I get my external hard drive off read only?

#3.Change Permission to Make a Drive not Read-Only
  1. Open Windows File Explorer in Windows 10/8/7.
  2. Connect the read-only drive to PC, right-click on the drive, and select “Properties”.
  3. Under the Security tab, tick “Read” and “Write” in the Allow column. Click “Apply”.

How do I change the file system on my external hard drive without formatting?

  1. Locate and scan the RAW hard drive.
  2. Find and preview found data in the RAW drive.
  3. Restore and save RAW drive data.
  4. Open “This PC” (Windows 10), right-click the RAW disk/partition, and choose “Format”.
  5. Select the NTFS file system and set up other necessary options.
  6. Click “Start” > “OK”.

Why can’t I move files from Mac to external hard drive?

The simplest reason why you may not be able to write to a hard drive is if it is full. Single-click on the disk in the Finder, then choose “Get Info” from the “File” menu. Check to make sure there is space listed after the label “Available:” in the General section of Get Info.

How do I change permissions on a Mac terminal?

  1. Open the Terminal application.
  2. Type ls –l , and then press Return. The symbolic permissions of the files and folders in your home directory are displayed, as shown below.
  3. Type chmod 755 foldername , and then press Return. This changes the permissions of the folder to rwxr-xr-x.

What are 755 permissions?

755 means read and execute access for everyone and also write access for the owner of the file. When you perform chmod 755 filename command you allow everyone to read and execute the file, the owner is allowed to write to the file as well.

How do I grant download permissions on Mac?

In System Preferences, click Security & Privacy, then click General. Click the lock and enter your password to make changes. Select App Store under the header “Allow apps downloaded from” and make sure “App Store and identified developers” isn’t enabled.

How do you fix you don’t have permission to open this file?

Right-click the file or folder, and then tap or click Properties. Click the Security tab. Under Group or user names, click your name to see the permissions that you have. Click Edit, click your name, select the checkboxes for the permissions that you must have, and then click OK.

How do you solve You don’t have permission to access on this server?

External hard drive not writable on mac
Solved: Access Denied, You Don’t Have Permission To Access on This Server
  1. Clearing your browser cookies and history.
  2. Turning off VPN and VPN extensions.
  3. Disabling your proxy.
  4. Switching to a premium VPN service.
  5. Resetting your browser data.

How do I give permission to access my hard drive?

Seagate Hard Drive Not Writable On Mac

Here is the full procedure: Right-click the folder, select Properties > Security Tab > Advanced at the bottom > Owner Tab > Edit > Highlight your username and put a tick in ‘Replace owner on subcontainers…’ and Apply > OK.

How do I change permissions on Seagate External Hard Drive Mac?

Solution: Change permissions on Seagate external hard drive
  1. Select Seagate external hard drive on your desktop or in the Finder sidebar, and then press Command + I to get information of the drive.
  2. Scroll to the bottom of this list and click on the triangle that is at the left side of the Sharing & Permissions tab.

Why did my external hard drive become read only?

The cause of this is due to the filing system the storage device is formatted in. … The cause of the “Read Only” behavior is due to the format of the file system. Many storage devices such as USB drives and external hard disk drives come pre-formatted in NTFS because a larger number of consumers are using them on PCs.

How do I unlock my Seagate hard drive?

  1. Open Toolkit.
  2. On the Main Menu, click on the device.
  3. Click Unlock.
  4. At the prompt, enter your password.
  5. Click Continue.

How do you unlock a Mac hard drive?

  1. Boot your Mac and hold down ⌘-R (Command –R) to boot from the Mac’s Recovery HD partition. …
  2. Open Disk Utility.
  3. Select your locked hard drive.
  4. Under the File menu, select Unlock “Drive Name” or Turn Off Encryption… , based on what you want to do.

How do I make my hard drive not read-only Mac?

Step 1: Right-click your external hard drive shown on your Mac and select “Get Info”. Step 2: Expand the “Sharing & Permissions” section, then click the lock to authenticate. Step 3: Check “Ignore ownership on this volume”.

How do I make a hard drive writable on a Mac?

Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed.

Does reformatting external hard drive delete everything?

Does formatting a hard drive erase everything on it? The answer is no. Formatting does not erase data on the disk, which only makes file recovery much more difficult.

How do I format my old hard drive for Mac?

  1. Connect the hard drive to your computer, power it on and launch Finder. …
  2. Click the Go menu and select Utilities. …
  3. Select the external hard drive (left; sorted Internal, External, and Disk Images) and click the Erase button. …
  4. Enter a Name, select the Format and Scheme, and click Erase.

How do I change my external hard drive from RAW to NTFS without losing data?

Step 1: Right click on the RAW drive in My Computer (This PC) or Disk Management. Step 2: Select “Format…”. Step 3: Select NTFS file system and then set other information (Allocation unit size, volume label, format options) about format process. Step 4: Click on “Start” to format the RAW drive to NTFS file system.

Why is my Mac not letting me drag?

If the Mac Trackpad or Mac Mouse is Bluetooth, try simply turning Bluetooth off, and then turning Bluetooth back on again. … Sometimes simply toggling Bluetooth off and on again resolves quirky issues including a failure of drag and drop to work.

How do you transfer files from a Mac to an external hard drive?

Click the Finder icon in the Dock to open a Finder window, then do one of the following to move your files. Move files to the storage device: Select one or more files on the desktop or in a folder, then drag them to the storage device, listed below Locations in the Finder sidebar.

How do I fix Permission denied in terminal?

The Bash permission denied error indicates you are trying to execute a file which you do not have permission to run. To fix this issue, use the chmod u+x command to give yourself permissions. If you cannot use this command, you may need to contact your system administrator to get access to a file.

How do I change file permissions?

  1. Login to your computer as an admin. …
  2. Right-click on the file or folder you want to change permissions and select Properties. …
  3. Select the Security tab. …
  4. Select the user you want to modify permissions and then click Edit.
  5. To add a new user or group click on Edit and then Add.
  6. Click Advanced and then Find now.

What is the difference between the permissions 777 and 775 of the chmod command?

1 Answer. The difference between 777 and 775 is the writable attribute for the world-group. The big risk with 777 is that any user on your server can edit the file. 775 does not have this risk.

Quick Tip: Solving “Read Only” External Drive Problems on Your Mac

Solved: External Hard Drive is Read Only on Mac

How to enable read & write permissions on a read only hard drive on Mac

How to Change Permissions for Files and Folders in Mac® OS X™

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By Katrina Posted to NTFS for Mac, updated on May 25th, 2020

Jul 28, 2016 Mac OS X one of the best operating system for Apple computers there are lots of series of computer available in Apple Stores. But sometimes performing several tasks on mac are very difficult in this article we went show you how to migrate folders and files of mac to external hard drive.

External hard drives are important storage media for both Mac and Windows users. Usually, you can read and write to files on an external hard drive on your Mac. But there are chances that this external hard drive shows read-only on Mac. For example, many people have reported that their WD My Passport external hard drives are read-only on Mac. When you check its disk information, you will find you can only read the external hard drive on Mac. Moreover, users who use USB flash drives and SD cards on Mac also encounter this read-only problem.

You may be wondering why you can't write to this external hard drive even though you are the owner of this disk, and more importantly, if you can fix this read-only problem without formatting or not?

Thus, this post will analyze three external hard drive read-only cases so that you can find a relevant and feasible solution to your problem.

Table of contents
Case 1: The read-only external hard drive is NTFS file system
Case 2: Disk permissions are changed as read-only
Case 3: Can't write to external hard drives on Mac due to disk errors
Bonus part: Fix SD card read-only on Mac

Case 1: The read-only external hard drive is NTFS file system

A file system controls how data is stored and retrieved on a disk. There are many different kinds of file systems, and each one has different structure and logic, properties of speed, flexibility, security, size, etc. By default, Windows uses Microsoft NTFS file system while Macs use HFS+ and APFS for OS volume. FAT32 and exFAT are usable for both Windows and Mac operating systems.

That's to say, you are unable to write to NTFS drives on macOS Catalina, Mojave, and any earlier Mac operating systems . If you try to copy or drag files on an NTFS-formatted external hard drive on Mac, you'll be unable to but see the greyed-out no symbol as below. And when you open files on this external hard drive, you will find your documents being read-only. For an NTFS file system SD card on Mac, files like photos are locked as you can only read them.

Therefore, if you find your external hard drive read-only, for example, a Seagate external hard drive shows read-only on Mac, the first thing that comes to your mind should be to check if this drive is NTFS file system.

How to check if an external hard drive is NTFS file system on Mac?

Simply, you can check this by viewing its disk information either in Disk Utility or in the Finder, and here is how.

Method 1: Check if an external hard drive is NTFS file system in Disk Utility

Step 1: Click on Launchpad at the dock of your Mac and choose Other in the menu.

Step 2: Choose Disk Utility among these utilities and open it.

Step 3: When it is launched, click on the external hard drive you have problem with in the left sidebar. You will see an obvious 'Windows NT File System' in the right column.

Method 2: Check if an external hard drive is NTFS file system in the Finder

You can also check this in the Finder with a few clicks.

Step 1: Open the Finder and right-click on this external hard drive.

Step 2: Choose Get info in the context menu.

Step 3: You will see 'Windows NT File System (NTFS)s' after File system if the read-only drive is formatted with Microsoft NTFS file system.

Then, after making sure that it is the Windows NTFS file system that makes your external hard drive read-only on Mac, you can go head to fix this problem. Try to repair the read-only external hard drive with or without formatting.

Solution 1: Format this external hard drive to exFAT/FAT32

It is possible that you just recently bought a new hard drive and found it is formatted as NTFS. In this case, if you don't have anything important on this drive or you have a copy of a data backup, you can simply format this external hard drive without worrying about data loss. To formatting this read-only hard drive, you can just go to Disk Utility and Erase it.

There are several formats you can choose, and erasing this disk into which file system depends on how you intend to use the drive.

  • APFS: If you plan to use the drive on macOS 10.15 Catalina, macOS 10.14 Mojave, and macOS 10.13 High Sierra, you can format it into APFS for better experience.
  • HFS+: It is also known as Mac OS Extended, whose later versions added journaling to prevent corruption of the file system structure. Therefore, you can choose HFS+ if you are going to use this external hard drive on macOS Sierra and earlier Mac operating systems.
  • FAT32/exFAT: If your storage device is an SD card or USB flash drive, and you'd like to read-write this portable drive both on Mac and Windows OS, you'd better erase it with exFAT or FAT32.

Solution 2: Run NTFS for Mac software on Mac

However, if you have several important files on this external hard drive, and you frequently swap your work between Windows and Mac computers, formatting this drive definitely is the last solution you would resort to. The reason is, as you may know, formatting a hard disk will wipe your data out of this drive and cause data loss.

Then when external drive is NTFS-formatted, how can you fix the read-only drive without formatting?

An NTFS driver for Mac should be the most convenient tool for people who want to fix this issue without formatting, because you can work natively and seamlessly on NTFS file system external hard drives on your Mac in a few clicks. The NTFS for Mac software you can try is iBoysoft NTFS for Mac to make the NTFS drives writable on Mac.

About iBoysoft NTFS for Mac

iBoysoft NTFS for Mac can mount NTFS external hard drives in read-write mode on your Mac, granting people full access to read, write, edit, copy, and delete files on NTFS-formatted drives.

iBoysoft NTFS for Mac- Best NTFS Disk Management for Mac

  • Grant full access to read, write, edit, copy, move, transfer, and delete files on NTFS file system external hard drives, SD cards, USB flash drives, etc. on Mac
  • Erase disks to NTFS file system on Mac
  • Unmount multiple drives with one click
  • Support macOS 10.15/10.14/10.13/10.12 and OS X 10.11/10.10/10.9/10.8

iBoysoft NTFS for Mac is also a wonderful tool to manage NTFS external drives on Mac. It's a menu bar app, from which users can mount, repair, erase NTFS hard drives, external hard drives, SD cards, USB flash drives, etc. with a simple click.

Tutorial to write to NTFS-formatted external hard drive on Mac with iBoysoft NTFS for Mac

Step 1: Free download, install and launch iBoysoft NTFS for Mac on your computers.

Step 2: Connect NTFS external hard drive to Mac.

Step 3: Write to NTFS external hard drive after the external hard drive is mounted successfully.

Solution 3: Fix read-only NTFS external hard drives with the command line (not recommend)

You can also try the experimental method to enable NTFS read-write support with command prompt on your Mac. However, it is not recommended as it is not stable and could result in data loss if it goes wrong. So, use the command line with caution!

Warning: Do not use this method as a long-term solution to write to NTFS drives that contain important files. Meanwhile, do not use this method if you are not familiar with the command line, in case that you input a wrong command and cause unexpected damage to your Mac and drives.

Well, if you insist…here is how to do this:

Step 1: Click Go at the upper right of your desktop and go to the Applications > Utilities > Terminal.

Step 2: Input 'sudo nano /etc/fstab' to edit the fstab file (supply your password when prompted).

Step 3: Type 'LABEL=NAME none ntfs rw,auto,nobrowse' in the editor window for the fstab file. (Be sure to change the word NAME to the name of your drive)

Step 4: Press Control + O to save the file, followed byControl + X to exit.

Step 5: Unmount your NTFS drive and attach it again.

Case 2: Disk permissions are changed as read-only

The Sharing and Permissions option is set up to determine who can delete or modify a file or program copied to the drive. Thus, if the permissions are changed by you or others, a message will pop up and inform you that the file is read-only or you don't have permission to save when you save changes to this disk.

How To Make Hard Drive Writable Mac

In this case, if you right-click on the icon of your disk and choose 'Get info' to check the disk information, you will find you can only read this external hard drive or SD card even though it is not NTFS file system. That's to say, you can't write to this drive.

If this is the cause for your external hard drive being read-only, you can try the following solutions and fix this issue without formatting your drive.

Solution 1: Change the permission of this external hard drive

If your files on this external hard drive show as read-only or locked, or if you try to move some files to the Trash but get no response, you can try to change the permission of this disk.

Step 1: Open the Finder and find your external hard drive in the left sidebar.

Step 2: Right-click on this drive or volume and choose Get info, and then scroll down to Sharing & Permissions.

Step 3: Extend this column by clicking on the triangle symbol, and then click on the Lock icon.

Step 4: Input the password of your Mac, and click on Read only, then change your privilege as Read & Write in the right column.

Step 5: Click the gear button (Action menu) at the bottom of the window, choose Apply to enclosed items, and then click OK to confirm the action.

Solution 2: Ignore Permissions on external hard drive in the Finder

To prevent such errors from happening, Mac operating system includes a setting to ignore Permissions on external drives, so all files on the drive should be fully accessible regardless of their Permissions settings. Here below are steps to ignore the permission on external hard drives:

Step 1: Select the external hard drive on your desktop or in the Finder sidebar, and then press Command + I to get information on the drive.

Step 2: Click on the arrow that is on the left side of the Sharing & Permissions tab near the bottom of the window.

Step 3: Check the box to Ignore ownership on this volume, or toggle it off and then on if it's already enabled. (Provide the password of your Mac if it is required.)

Case 3: Can't write to external hard drives on Mac due to disk errors

Some internal errors will cause a drive to be read-only as well. When this happens, your drive will be only mounted in read-only mode to prevent the data on it from corruption.

Solution: Repair read-only external hard drive with Disk Utility

Fortunately, you can take some actions to repair these minor disk errors with Disk Utility on your Mac. You can use the following guide to fix read-only external hard drive in Disk Utility without formatting.

Step 1: Click Go at the upper right of your desktop and go to Utilities, and then open Disk Utility.

Step 2: Select the read-only external hard drive on the left window.

Step 3: Click First Aid in the and choose Run.

However, it is possible that an NTFS format is not the culprit of your disk being read-only. On the contrary, some other reasons make your disk not writable. For instance, if your disk becomes read-only after a macOS update, you may be facing one of the rare glitches of a macOS. Under this circumstance, if the solutions above are unable to fix this read-only external hard drive, you may need to format this drive, and then recover your important data from the formatted external hard drive instead.

Bonus part: Fix SD card read-only on Mac

Except for external hard drives, memory cards like micro SD cards and SDHC cards could be read-only on Mac as well. It could occur whether you access the SD card via a card slot or connect the camera to the Mac. If you have tried the solutions mentioned above and none of them work for you, here is a bonus tip.

Solution 1: For most cases, you need to make sure that you slide the write protection switch to the unlocked positition. It's possible that some USB SD card adapters don't honor that switch, but the card reader on Mac definitely does.

Solution 2: If the SD card is read-only on Mac still, you may want to slide the read-write lock to the middle neutral position and retry. Strange though, sliding the 'lock' switch on the card halfway does help mount SD cards in read-write mode.


Generally speaking, external hard drives being read-only on Mac appears when they are not formatted correctly and the solutions above should be helpful. Nevertheless, if you failed to repair this hard disk even with Disk Utility, it could be a failed external hard drive which needs to be replaced, or you can try your luck by sending it to a local disk repair service.

If you read my previous post about how to format an external drive for Mac, you know that I bought a 2TB Seagate Expansion external hard drive and managed to create two partitions on the disk — one for Mac backup purposes, and the other for personal use.

In this article, I’m going to show you how to back up your Mac data to an external drive. You should back up your Mac on a regular basis, especially if you’re planning to perform macOS updates.

I did this several weeks ago while preparing my MacBook Pro for a system update. You may also be interested in taking a look at the macOS Catalina slow issues we encountered during that process just in case you also want to upgrade your Mac to the latest operating system.

Please note that the backup tool that I used is Time Machine, a built-in app provided by Apple. If you want to back up your Mac data without using Time Machine, there are also other third-party Mac backup software worth considering.

Where is Time Machine on Mac?

Time Machine is a built-in app within macOS ever since OS X 10.5. To find it, click on the Apple logo on the top left corner of your screen, then select System Preferences.

In the Preferences Pane, you’ll see the app located between “Date & Time” and “Accessibility”.

What does Time Machine Backup?

Time Machine is the easiest way to back up Mac. And the app is created and recommended by Apple. Once you have a timely backup, it’s incredibly easy to restore all or part of your data in case of accidental deletion or a hard drive crash.

Can't Transfer Files From Mac To External Hard Drive

So, what kind of data does Time Machine backup? Everything!

Mac Os File System

Photos, videos, documents, applications, system files, accounts, preferences, messages, you name it. They all can be backed up by Time Machine. You can then restore your data from a Time Machine snapshot. To do so, first open Finder, then Applications, and click on Time Machine to continue.

Be aware that the recovery process can be only be conducted when your Mac can start up normally.

A Step-by-Step Guide to Backing up Mac to an External Hard Drive

Note: the screenshots below are taken based on an older macOS. If your Mac is running Mojave or Catalina, they will look slightly different but the process should be similar.

Step 1: Connect your external hard drive.

First, use the USB cable (or USB-C cable if you’re on the newest Mac model with Thunderbolt 3 ports) that comes with your external drive to connect that drive to your Mac.

Once the disk icon shows up on your desktop (if it doesn’t, open Finder > Preferences > General, and here make sure you’ve checked “External disks” to let them show on the desktop), move on to Step 2.

Note: if your external drive can’t show up on Mac or macOS hints the drive is not supported, you’ll have to re-format it to a Mac-compatible file system before continuing the following steps.

Step 2: Select the disk for backup.

Now open Time Machine (I tell you how above) and select the disk you want to use. I have partitioned my Seagate drive into two new volumes, “Backup” and “Personal Use”, as you see from the screenshot. I chose “Backup”.

Step 3: Confirm backup (optional).

If you have used another disk for backup before, Time Machine will ask you whether you want to stop backing up to the previous disk and use the new one instead. It’s up to you. I selected “Replace”.

Step 4: Wait until the process is complete.

Now Time Machine will start to backup all your data. The progress bar gives you an estimate of how much time is left before the backup is complete. I found it a bit inaccurate: Initially, it said “About 5 hours remaining”, but it only took two hours to finish. It’s worth noting that the remaining time may vary from case to case depending on the write speed of your external hard drive.

After about an hour and a half, it says only 15 minutes remaining

Step 5: Eject your external drive and unplug it.

When the backup procedure is completed, don’t rush to disconnect your device as this could cause potential disk problems. Instead, go back to the main desktop, locate the volume that your external hard drive represents, right-click and select Eject. Then, you can safely unplug the device and put it in a safe place.

Final Words

Like any other hardware device, an external hard drive will fail sooner or later. It’s best to make a copy of the data on your external drive — as they say, a “backup of your backups”!

One good option is to use cloud storage services like iDrive which I’ve been using and I really like the app because it’s super easy to use, and it also allows me to download Facebook photos automatically. Backblaze and Carbonite are also popular options in the market, though I am yet to give them a try.

I hope you find this tutorial helpful. I can’t emphasize enough the importance of data backup these days, especially when my mid-2012 MacBook hard drive died all of a sudden. I’ve also seen cases where my friend’s computer and hard drive failed. You can imagine their desperation. Without a proper backup, it’s really hard to restore data. Although you could try a third-party data recovery program, chances are they won’t get all your lost data back.

Toshiba External Hard Drive Not Writable On Mac

Anyway, the main takeaway I want you to have from this article is this: back up your Mac with Time Machine or another app, and create a second or third copy of those backups if you can.