HOW TO REMOVE UNALLOCATED PARTITION IN WINDOWS 10 WINDOWS
# Method2: Use Windows Disk Management to Solve Disk Drive Unallocation Problem
I request you, be extra careful while you are doing it because it may be harmful to your USB drive if there are some operations accidentally is canceled or undone. I hope this method will definitely help you to make complete deletion of your defected USB drive. In this event, Diskpart just helps you create a partition that fixes unallocated USB drive space problem effortlessly. When you are done with all, just type Exit to close the whole command prompt window.For example, to make a 4000MB of partition, run command “create partition primary size=4000”. Follow the syntax: create partition primary. If you need to make more than one on the USB drive, you have to specify the partition size as you do in a time of format your computer in BIOS system. Now type “create partition primary” command to create a primary partition on the USB drive.Run “clean” to erase all volumes and segments that the drive you choose, which is your USB drive.From here, you can see that the disk number of your USB drive is 2, so just you have to type “select disk 2”.