Trying to encrypt Samsung SSD T7 Shield - can't choose APFS/GUID

manamamatt wrote:

Hi all. I have a M1 MacBook Pro 16 inch 2021, on Ventura 13.2.1.

I have read loads of threads but can't resolve the issue.

I've just bought the Samsung T7 shield and want to erase and encrypt the drive. I don't want to use the Samsung software. I believe that I need to select APFS or GUID, but this isn't an option.

When I go to erase, I can only choose from the following Formats (see pic):

-Mac OS Extended (journaled)

-Mac OS Extended (case sensitive)

-MS-DOS (FAT)

-ExFAT.

https://discussions.apple.com/content/attachment/d1f6d63f-3a1c-4225-9903-f204e5b75b03

I also tried right-clicking on the drive, where it does list APFS but this doesn't work (see pics).

https://discussions.apple.com/content/attachment/30fb4677-6698-419b-81db-799cb7e18385

https://discussions.apple.com/content/attachment/b30d52da-d035-44a0-967f-e8263f0ecfd4

I'd welcome any suggestions and help.

Thank you in advance

Note your error message—

see Disk Utility>View>Show All Devices

You need to be erasing, reformatting, initializing the parent drive, not the Volume level, not the Container level

ref:

Erase and reformat a storage device in Disk Utility on Mac

https://support.apple.com/guide/disk-utility/erase-and-reformat-a-storage-device-dskutl14079/22.0/mac/13.0