I'd like to backup a directory of large files to a locally attached external USB disk, and not remove any of the files that have been already been backed up (using rsync) to the destination disk. However, if the path to the file on the source disk has changed, I'd like to update the path on the destination disk (if possible).
- keep all files on destination, ie. do not remove ANY files from destination
- however if a file moves on the source, update the path on the destination
- if a file is removed from the source, do NOT remove from destination