Don't delete and copy: Just detect or renamed moved file

[teknikool]

My issue is that all I'm really doing is moving files from one folder to another and when I sync, it deletes the file and then recopies it. This is especially painful with backups. Imagine a single file being 100GB transferring to a NAS on 802.11g. And the router is on the other side of the house. It sometimes takes 2-3 DAYS to transfer ONE file. And sometimes I'm not moving the file. Sometimes it stays in the same place and all I'm doing is renaming the file.

The comparison checks over 500,000 files locally (2.6 TB) and it's checking that on the network, too. It generally takes about an hour or two just to check.