What's the point? Transfer rates copying to NAS have been identified in initial troubleshooting:
NAS < Desktop1 = 70 MB/s
NAS < Desktop1_Linux = 40 MB/s
NAS < Desktop1_OSX = 5 MB/s
The transfer rate from Desktop_1 to NAS has never been an issue on Windows, only on OS X which you don't support officially anyways. I have two drives in Desktop_1, one is Samsung 840 EVO 512GB SSD, other is WD RED 3TB HDD, and copying from one to another is very fast, 100+ MB/s, showing that drives are not the issue. Using one or the other as copy source/target when interacting with NAS doesn't make a difference.