Generally speaking, a 4 year-old laptop is worth nothing ... unless it's a VERY high spec machine (as used by some physics researchers), or possibly a top of the range model from a brand like Apple ...
If you don’t need the fastest USB drive around, you can save a bit by opting for a USB 2.0 or USB 3.0 drive but it will take longer to transfer files onto and off of the device. USB 3.0: Up to 5 ...