I've got Deja Dup (14.2) backing up to an external USB drive on Lucid. Up until now, I've had "Keep Backups for" set to "Forever". However, after a couple of months of usage, the drive is now full.
I've tried setting the "Keep Backups for" setting to a shorter time period, even as low as one week, my assumption being that older backups would be cleared when the next backup runs. However this doesn't seem to happen and I get an error message along the lines of "cannot copy temp file x to backup location y" and the backup stops.
How come space isn't being made for the new backup?