Well, what is the best format for USB drive? How to choose the best format for USB drive?īefore you try to choose the best format for your USB drive, you need to know what file system it is in. Before you use a new USB drive, you need to first format it. Nowadays, USB flash drive is widely used on various electronic devices due to its portability. How to Format USB Drive in Windows or Mac.How to Choose the Best Format for USB drive.