I bought 1TB External Hard drive and it's very slow.I have 2 usb ports on my laptop and I tried to use both of them,the first time I open the external HDD it runs perfectly smooth and speed but the second time it becomes slower.
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Are they usb 2.0? Even 2.0 is going to be slow for HD access, if they aren't it would probably be horrible.
What do you mean by 'second time'? Do you mean it is now always slow?
USB 2 is very slow....e-sata is by far the better option until USB 3 comes along.