Care is required to backup since the default backup name is as above. This is aggravated by the name entry line color being the same as the rest of the page. Maybe a different color for the text entry along with the right default name?
I noticed this, but didn't really consider it a problem as I always rename my backups to include the date - which is obviously unique.
I do also, but I almost missed it a couple of times so I thought I'd bring it up before someone screwed up. You know if /when it happens it will be with a really important file, you know, Murphy's Law.
I've changed the default to MobileSheetsProBackup - thanks!
Mike