A better way to overcome the situation is by choosing an effective method to improve the transferring progress. It is annoying when you find that your USB drive is transferring at slow speeds. If you lost files during the transferring process, download iBeesoft Data Recovery to recover them. Here in the article, 4 ways are provided for you to improve the USB transfer speed on Mac. If your Mac storage is not big enough to store all the files you need, then you have to make use of USB flash drives. USB slow transfer speed on Mac is annoying.