Usb1.......no.......too slow.
Usb2.......iffy.......better
Usb3.......yes......better/better.
I run a hd>hd clone monthly.......works fine.
It's not a blink of an eye thing but in 4 or 5 mins it's done.
Hello,
If someone wanted to clone a hard drive, is it feasible to use a External Hard drive by transferring the entire Main drive by a 3.0 USB to the External Hard drive..

Chowhound
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