I’m running macOS Monterey (12.1) on an ancient iMac (Retina 5K, 27-inch, Late 2015, iMac17,1; shipped with 10.11 El Capitan and all newer OS installs have been updates, NOT clean installs).
→ About This Mac → System Report → Hardware → Storage reports:
Two Internal Drives used for macOS, applications, and data:
- 121GB SSD formatted as APFS (64GB free)
- 6TB SATA Spinning Rust formatted as Journaled HFS+ (3.6TB Free)
One External USB3 Drive used for Time Machine continuously for over five years:
4TB Spinning Rust formatted as Journaled HFS+
Would my Time Machine backup be more robust if the external drive were formatted as APFS? As I understand, APFS supports snapshots (like ZFS) so I was thinking that Monterey TM would make use of snapshots for its backups instead of hard links like TM used in the past. Is a Monterey Time Machine backup more robust on a drive formatted as APFS (vs. HFS+ Journaled) or not?
Would you recommend any utility to clean off old cruft from prior operating system versions?