Dear sirs
I want to buy an External Hard disk and i need a comparison chart between differrent hard disks.can u help me. speed and capacity and its small dimensions and ease of use is important for me.
Not to be rude, but do some research on your own. We're here to help ppl with basic questions and problems- not to provide benchmark links. There's at least a half of dozen external hard disk reviews on this site alone. Google it.