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I purchase a new Samsung T7 SSD to speed up backups on Time Machine.
I am running Big Sur 11.5.2 on my 16inch Macbook Pro.
I formatted it and it is recognised in Finder and in Disk Utility.
I open Time Machine to add a new Backup Disk, and it is not shown as attached and available.
What is problem ?
The file system recognises the drive, Disk Utility can format it and recognises it, but it is invisible to Time Machine.
How did you format the drive, it should be APFS.
Open Disk Utility, highlight the Disk not any indented Volumes.
The Disk will be called Samsung SSD..... or something similar.
Click Erase.
Format: APFS
Scheme: GUID Partition Map.
Click Erase.
When Done quit Disk Utility.
Open System Preferences> Time Machine
can you now select the drive.
I had partitioned the drive then intialised the large partition as MacOS Extended (Journaled).
So now I have intialised the entire drive, then partitioned the Time Machine area, and that works.
That is some guidance that Apple's Time Machine setup instructions should include..
Thanks for the insight.
Partition scheme must be GUID before APFS is selectable.
I don't know if you have used Disk Utility recently, but the options presented by Big Sur are :
* MacOS Extended (Journaled)
* MacOS Extended (Journaled, case sensitive)
* MS-DOS (FAT)
* exFAT
* Microsoft NTFS
How would I select your proposed option of APFS ?
To add to @Matti Haveri:
Time Machine does not recognise my SSD
