UI: automatic backup when USB drive is detected

[stpr]

Related thread:

Backing up sporadically mounted drives

Hi there, I want to schedule backups of certain drives that I connect/mount haphazardly. For me it would be enough that, whenever they’re found mounted, they’re backed up or otherwise just skipped. They all have different mount points (it is an assortment of zfs/btrfs pools and rclone remotes). From my tests, when the drives are unmounted kopia creates an empty backup, which is lumped together with all other identical empty backups. This is to some extent acceptable, although it enters into th…

I think that is definitely a userful criteria, seems like it is currently under proposal stage.