Is USB hard drive or USB flash drive that you own?
Before you start to create multiple partitions on USB drive, you need figure out the one you own is USB hard drive or USB flash drive because they are such different and should be done with different ways.
An USB hard drive is an external hard drive which has the same design with an internal hard drive, except that USB hard drive comes in an external casing that protects the drive. And the case includes a USB interface allowing you to connect the drive to your USB port using a USB cable. Like hard drive, it stores data using spindles of disk that spin thousand of times every minute, however, a USB flash drive is a solid state device without moving part and stores data electronically. From appearance, it is easy for you to distinguish them, but Windows will define them in another way.
For Windows, an USB hard drive is a fixed disk and an USB flash drive is a removable disk, and fixed disks can have multiple partitions whileremovable disk can have only one partition. Therefore, if you own an USB flash drive, you should turn it into fixed USB device in Windows before creating multiple partitions.
How to create multiple partitions on USB drive?
As said before, if you own an USB flash drive, convert it into a fixed USB device is a must. Here, you can use vendor-provided utility for flipping removable\fixed bit on particular USB device. Next, we will do the same to create partitions on USB.
Step 1:Download, install and launch AOMEI Partition Assistant. Right click the unallocated space on USB drive, select “Create Partition”.
Step 2: In the pop-up window, you can decide the capacity of the new partition by inputting exact number or dragging the slider bar. Here, you also can set the partition label, drive letter, partition type and file system.
Step 3: At last, you can preview the new partition, and then click "Apply" on the toolbar to save the operation.
Then, you can create other partitions one by one.
In conclusion, as a powerful partition magic tool, AOMEI Partition Assistant helps you to deal with partition problems easily and safely. It also has the features, such as, "Resize Partition" "Split Partition" "Copy Partition" "Migrate OS to SSD" etc. Download the software and try it out in person.
Also, you can use the paid AOMEI Partition Assistant Professional edition to do some special work, for example, you can use it to allocate free space from one partition to another, convert system disk between MBR and GPT partition styles, and convert primary partition to logical and vice versa, etc.