I routinely move data from my Windows 7 64bit PC to a USB 2.0 (8GB) thumb drive.
I use WINRAR to compress some content and then copy to the thumb drive. I mostly do this because I develop software and I move the development work between work and home.
After dragging the compressed archive to the thumb drive, Windows shows the copying dialog for several seconds; at least 30-40 seconds on average I would say.
Then the actual copying beings, I guess, evident by the progress percent coming to life and moving from left to right. The compressed archive is around 300 MB.
It doesn't seem to matter if the file is compressed or not; just the size.
If I expand the details on the copying dialog, it says it's calculating the various times.
Hoping to see if there are any registry hacks I can use to speed this up or eliminate any post size calculations (at my own risk).