Sequoia: USB External Drive Spontaneously Un-mounting
I have an M1 Mac mini and my external USB drive (USB-3), which was rock-solid under Sonoma, now spontaneously (and seemingly randomly) un-mounts.
It will even un-mount if it is in use! This makes, for example, completing a Time Machine backup very unpredictable.
This drive *does* auto-mount (albeit slowly) when the mini is booted, and it will re-mount on its own (slowly) after un-mounting, but at that point the damage is done.
I have disabled "Put hard disks to sleep when possible" in System Settings>Energy.
I am on macOS Sequoia 15.2. But this happened on earlier versions of Sequoia, too.
I don't see what could be wrong since this drive worked *perfectly* when I was running Sonoma.
Any tips?
Mac mini, macOS 15.2