Was just looking at my move code, looks like I'm really doing a move, not a copying file.
Can you test using DOS command?
move "c:\oldmovie.avi" "d:\newmovie.avi" for example.http://www.computerhope.com/movehlp.htm
Test moving a giant file between different HDD drives.
I did use a fake copying, but forgot I've already changed it to a real move function.
On my normal HDD, moving is as fast as using windows explorer.
Awesome. You are absolutely correct. Turns out Windows can't handle different NAS volumes very well. As my "downloads" directory was on a seperate volume from my TV archive, it was windows doing the fake move, not renamer. I have now moved the downloads folder to the same as my archive, and bam, instant move and renaming!
Thanks alot for the heads up