External hard drive write access mac

Make sure to back up any important data before formatting the drive. RSS feeds.

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Search Search. Available article translations: Unable to write on the external hard drive with NTFS file system. Parallels Desktop 9 for Mac Standard Edition. Unable to write on the Seagate Backup Plus Drive. As the possible workaround you can: If the issue still persists please change device file system: Make sure the device is on the Mac side. Click the "Erase" tab on the right pane.

How to Write to an External Hard Drive on Mac OS X: 15 Steps

Depending on the size of the drive and the security selection, formatting might take a few seconds or several minutes. Email subscription for changes to this article. RSS subscription for changes to this article. Save as PDF. The most popular articles Uninstall Parallels Desktop for Mac. The license server rejects it. All rights reserved. Legal Notices Terms of Use. Parallels Desktop for Mac registration and activation.

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Install Windows on your Mac using Parallels Desktop. Product Family. Todo Backup Advanced Server. An incompatible file system, faulty permission settings, and unexpected formatting error are all likely to cause your external hard drive to show up as 'Read Only' on your Mac. Luckily, there are solutions to these problems, either by formatting the device, changing settings, or repairing your device.

Besides, if you get your data lost during the problem-solving process, you can retrieve your data with EaseUS Data Recovery Wizard. Try these tips without worries!

How to Format External Hard Drive for Mac & Windows (MS-Dos or ExFat?)

I'm having this problem that my Seagate external hard drive suddenly turned to read-only this morning when I connected it to Mac. I could only read and view saved data on the drive. But get no access to use the data on my external hard drive. If you have any clues to get permissions to access the read-only external hard drive on Mac, please tell me. Thanks very much. If you right-click your external storage device, select 'Get Info', and see 'You can only read' at the bottom of the info window, you are encountering one of the commonest problems with an external hard drive.

When you can't use your external storage devices normally, it could be quite annoying and frustrating for the problem not only represents a threat to your work efficiency but also shows the possibility of data loss.

Fix External Hard Drive 'Read Only' Error on Mac Without Losing Data

Why can you only read the external hard drive that is connected to your Mac? There are three possible reasons. Right-click your hard disk and select 'Get Info'. If you find your external hard drive is NTFS format, that's what the cause is.

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The incompatibility of the file system is the main cause of the error-external hard drive 'Read Only' on Mac. NTFS is a file system that is optimal for Windows-based computer.

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Although the Mac operating system allows you to read the files on external hard drive, you can't write files to it because the way that NTFS writes data to the device is incompatible with the way of macOS doing it. Go to the Fix. An external hard drive is subject to the access permission set up by OS X for all files and folders on the system. When you use the device on another computer with a different OS, the permission settings with it may not be recognized or prevent access to the files on the hard disk. Another common cause for the external hard drive 'Read Only' problem on Mac is the formatting errors of the storage device itself.

If you see a warning says the device is only being mounted in read-only mode while connecting, your hard disk is diagnosed to have formatting errors that prevent you from writing files to it. Identify the cause that leads to the 'Read Only' error on your Mac from the information above, then follow the corresponding solution to solve the problem with ease. If your external hard drive is read-only on your Mac due to its NTFS file system, you can easily fix it by reformatting the device to a Mac-compatible format with the built-in Disk Utility on Mac.

Before that, remember to back up your external hard drive quickly with a highly-efficient data backup software since the formatting will erase all the files on the device. Step 2: In the list of available drives on the left, choose the problematic external hard drive. Then click the 'Erase' option in the main window. Step 3: Choose a proper file system and rename your hard disk. Wait for the reformatting process to complete and then go to the information window, this time you will see the 'You can only read' has changed to 'You can read and write', which means you can read and write the drive on your Mac normally.


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Generally speaking, when a storage device shows up as read-only, you can still copy files off of it. If you cannot view or see all saved data on the drive, don't worry.