I have a WD 1TB My Book Essential, and an older IO-Mega 320GB external drive.
The WD is connected to a USB 3 port on my computer, but with a USB 2 cable, so I should get 480 Mb/s.
The IO-Mega is USB 2, and connected via a USB hub. It’s rated at 480 Mb/s.
I run a montly backup, one after the other to both drives. It was about 75GB today.
Backing up to the IO-Mega took 1 hour and 20 minutes.
Backing up to the WD took 3 hours and 58 minutes.
Any ideas?