I bought a couple of cheap USB thumbdrives the other day looking for an easy way to get some files to friends. Turns out that copying 8GB of photos is going to take most of a working day due to the fact I got USB 2.0 drives.... I'm stuck with them now as I'm not going to buy new ones but I will need to plan the copying bit so that it runs during the night for example.
Bottom line: get USB3 drives next time!