When you purchase a USB hard drive, the drive is formatted as one single partition. Splitting the drive into multiple partitions allows you to keep your data separate from other data. For example, one partition can be used for system backups, while the other can store the music and videos that won’t fit on your internal hard drive. Splitting the USB drive into multiple partitions is simple. It is important to back up any data on the drive before splitting. Tips Writer Bio

How to Split a USB Partition - 60