Due to the fact that Time Machine on HFS+ (TMH) is structured completely different from Time Machine on APFS (TMA), you can’t just convert a volume from one to the other. Secondly, you make me wonder: is it possible to move/import my existing, multi-year HFS+ TM history to a new (empty) APFS TM drive? (Sounds too good to be true, but I have to ask.) Would you recommend any utility to clean off old cruft from prior operating system versions? Is a Monterey Time Machine backup more robust on a drive formatted as APFS (vs. 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. One External USB3 Drive used for Time Machine continuously for over five years:ĤTB Spinning Rust formatted as Journaled HFS+ 6TB SATA Spinning Rust formatted as Journaled HFS+ (3.6TB Free).121GB SSD formatted as APFS (64GB free).Two Internal Drives used for macOS, applications, and data: → About This Mac → System Report → Hardware → Storage reports: 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).
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