Acomdata EXTERNAL E5 HARD DRIVE USB 2.0 User Manual page 72

connect the Drive. Plug the Drive into a data port on your com-
puter and try the format again. You may also come across this
error if you are using Windows XP or 2000 and you try to format
the Drive using the FAT32 file system.
After I connected the Drive, I got the following alert message:
"Hi-Speed USB device plugged into non-Hi-Speed USB Hub."
A: Windows XP and 2000 users will get this alert message if you
plugged the Drive into a USB port that only support USB 1.1.
This is fine, except your AcomData Drive will operate USB 1.1
speeds (up to 12 Mbps).
Performance seems to be slower than 480 Mbps.
A: First, in order to reach USB 2.0 speeds, you need a connec-
tion that supports USB 2.0. If the connection only supports USB
1.1 the Drive will operate at USB 1.1 speeds (up to 12 Mbps).
The Drive will auto-sense the speed of your USB port and adjust
between USB 1.1 and USB 2.0. Second, 480 Mbps is the maxi-
mum interface transfer rate of USB 2.0. Actual data transfer rates
will vary depending on a number of factors. See "About Hi-
Speed USB 2.0" for more information.