1. On the desktop of Windows 10 system, right-click the "this pc" icon on the desktop and select the "Manage" menu item from the pop-up menu.
2. In the Computer Management window that opens, click the Disk Management menu item in the left sidebar.
You can find the information list of USB flash drive in the window on the right.
4. Right-click the USB flash drive icon, and then select the "Delete Volume" menu item from the pop-up menu.
5. A confirmation window for deleting the simple volume will pop up, and click "Yes".
6. After deletion, right-click the USB flash drive icon and click "New Simple Volume" in the pop-up menu.
7. Then, in the pop-up window, enter the size of the partition to be created on the U disk. For example, to create a 5G partition, just enter 5000. Then click the Next button.
8. Finally, just assign the drive number to the USB flash drive.
9. In the same way, create new partitions for other unallocated areas, so that the U disk is divided into multiple partitions, which is convenient for managing the files inside.