I have a WD Passport 1tb drive, and a 3tb Seagate 3tb GoFlex drive; both are external, both are usb 3.0, and both are slow as molasses: the most I can get out of them is 30MBs.
I've tried copying from one drive to another, copying a file from one place on the drive to another (ie, on the same drive), and copying from the USB drive to the internal SSD, and the performance is still FAR below the 80MBs+ the drive is capable of.
The workstation is a Dell Precision 7500, 192 gig ram, 500 gb ssd internal, 500 gbb hdd internal, win 7 64 bit.
I've also tried attaching just 1 of the usb drives at a time, same results. Any ideas?