disk not mounted hd volume (free space and volumes)
This has got me confused. I've been having trouble backing up to Time Machine, and today it was saying that the hard drive was full (I think it meant Macintosh HD, since the MyBook backup drive is 8tb and empty). I've got volumes for OS/general-purpose, one for my Lightroom Catalog database files (LR Catalog), and another for photos when I'm on location (Travel Photos). What is that huge grey "1 Not Mounted" space? Is that space that is supposed to get automatically shuffled as needed when another volume fills up, or do I have unallocated space, and I need to either make another volume out of it, or increase the size of the other volumes?
MacBook Pro (2020 and later)