If you do not want to use a flash key to transfer the files, you could use UNC network path.
Install synctoy on one machine, let's say your Windows 2003 Enterprise machine. Create folder pairs left folder is SBS files, right one is tha attached NAS devices. Try to use contribute first in case there is any un-wanted delete.
I did not test exactly this scenario before, but you can have a try with a few dumy folder first, before using for your really files.
This is a very useful way and lowest risk in case there are mis-operation.
Thanks,
Ping
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