Cannot Restore Yesterday's Version of a File
I use Time Machine to back up my MacBook Pro M1 hourly, alternately to one or the other of my two 8TB Oyen Digital USB-C drives. Yet when I browse the backups of a file, I'm presented with three choices, none of which are older than the original. ALL the rest of the backups going back 8 months are GRAYED OUT.
Have I been using Time Machine for nothing? Is it a matter of waiting a little longer than 30 minutes?
What's going on?
MacBook Pro 13″, macOS 11.7