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Please note that the core macOS is the same for all the versions, including the latest macOS Monterey, Big Sure, or the earlier. This tutorial will show you three scenarios you may face and their corresponding solutions for your Mac, not reading an external hard drive or writing any data on your external hard drive, including new file creation, modifying or deleting data or files, etc. How to Fix Read-Only External Drive on macOS Big Sur and macOS Monterey So here we are going to see the scenarios and the fixes for the issue on Mac. So when they connect an external hard drive to Mac, they can only view files on the drive but can’t save any files or delete data from it.
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Many users have reported that their external hard drives are read only. While macOS Monterey is out now, the read-only external hard drive issue is still a problem for Monterey and Big Sur users.
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