The 3.0 USB cable of my hard drive is not working on my computer but when I use USB 2.0 cable it works. I tried it to other computer and it works. I think the problem is on my computer.
Is that a laptop or some portable device ? Some like that may not provide enough power.
It's laptop.
Yesterday I tried plugging the same external hard drive and it works but when I tried my hard drive with the same USB port and the same cable it didn't work.