MacBook Air 2015 will not allow permission changes on Seagate One Touch 5tb

When I try to change my Sharing & Permissions on a Seagate One Touch 4tb External Hard Drive, Finder says "This operation can't be completed because you don't have the necessary permission.

I'm logged in as Admin. Seagate Toolkit has be uninstalled. I have logged into Finder. I have no problems with a Seagate Backup Plus 5tb

MacBook Air 13″, macOS 12.6

Posted on Feb 16, 2023 9:50 AM

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3 replies

John Galt

Level 10

153,856 points

Feb 16, 2023 12:59 PM in response to Sr apple student

If it is used for Time Machine backups then TM "owns" that disk and you don't have permission to alter its contents.

If it is not used for TM backups then you can reformat it using Disk Utility, and you will have permission to alter its contents.

John Galt

Level 10

153,856 points

Feb 16, 2023 1:55 PM in response to Sr apple student

Before you do that Get Info for that drive and determine if there is an "Ignore ownership on this volume" checkbox. If there is, click the "lock" icon to authenticate, and select it.

That option will not even appear on TM backup drives.

Feb 16, 2023 1:38 PM in response to John Galt

I checked. It's not, so I'll reformat the drive. Thanks for the feedback.

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MacBook Air 2015 will not allow permission changes on Seagate One Touch 5tb