We use the backup file name to implement other features, for example to automatically delete old files, count the number of existing backups, detect the owner (vmid), ...
This would be impossible if we allow arbitrary renames...
How about a rename feature that doesn't actually do a file rename on the file itself, but in the virtual space for that file?
For example each backup could have a config text file for it, where the "virtual filename" could be stored, and the gui could display this with or without the real filename. Not sure if I make any sense, but being able to set a label for a backup seems like a good feature anyways.
We use the backup file name to implement other features, for example to automatically delete old files, count the number of existing backups, detect the owner (vmid), ...
This would be impossible if we allow arbitrary renames...