You’ll want to make sure you’re using a USB 2.0 Cable. and that the USB ports on your laptop work at 2.0 speeds. If you’re using windows, you should be able to tell by looking at your hardware profile. USB is also limited by the speed of your bios and your processor speed, since not all of the processing for the devices is done by the ports themselves, especially when copying files. If you have a slower computer, if you’re doing a lot of other processor intensive tasks, or you have less memory available, you’ll likely notice a slower speed.