formatting a TM drive

[zoran]

How should i format a 2.5" 2TB external drive i have, in order to use as TMachine backup drive for use in Monterey?

 

[bogdanw]

Apple: "APFS or APFS Encrypted disks are the preferred format for a Time Machine backup disk."
https://support.apple.com/guide/mac...n-use-with-time-machine-mh15139/12.0/mac/12.0

I would suggest Mac OS Extended (Journaled) Plus (HFS+, Journaled HFS Plus).

"Time Machine still supports backups on Mac OS Extended format (Journaled), Mac OS Extended (Case-sensitive, Journaled), and Xsan formatted disks."

File system formats available in Disk Utility on Mac https://support.apple.com/guide/disk-utility/file-system-formats-dsku19ed921c/mac