Time Machine does not recognise my SSD
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.