I have a directory with 1000 something video files that are backed up on an external drive. The content of a video file doesn't change.
So I need a syncing tool that follows the following rule.
If a file doesn't exist in backup, create it.
If a file exist in backup, but not original, delete it, or ideally ask me what to do.
If a file exists in both original and backup, check if the file name and size are the same, if yes, ignore it. If not, overwrite it or ideally ask me. Bonus if it also checks the first KB of the backup file to ensure it's not truncated by zeroes.