You may have noticed slow copy speeds with some pen drives. Here is a trick which help in increasing the speed or giving a speed boost to your pendrive.
· Plug in your USB Drive.
· Then Open My Computer> right-click on your USB Drive >click Properties.
· Select your USB drive Under Hardwares and choose Properties.
· You will see a dialog box saying " Optimize for quick removal".This option is selected by default.
· Select "Optimize for Performance"option.
· Now, remove USB drive and plug it again.
· Copy some files from the drive to your system or vice-versa. You can notice the speed increase.

This trick may some times create write errors.But it will come in handy while copying files larger than a size of 1GB.