I have a Corsair Voyager 32GB DiskOnKey, and when I transfer files to it, they're written very fast, but the move operation halts after each file. Write, halt, write, halt for each file written. I was wondering what could cause it? Usually it's done by AntiVirus software, but I also have an external HDD in which this doesn't happen. All of the basic Vista protections are off. The only thing I've changed in the device itself is reformat it with NTFS with a block size of 512 bytes. But I haven't ran the device with any other file system, so I don't know if this is the problem.
I also tried to work with it on XP on another computer, and it happens there too.
Though I haven't measured the halt after each file transfer, it seems correlated to the file size. Small files have clearly shorter halts than large files.