How to Delete Linux Partitions on USB Drive using DISKPART on Windows 10
On your Windows 10 computer, insert the linux USB drive
Press the Windows + R button on your keyboard
In the newly launched RUN box, type:
And press Enter
From the DISKPART box, type in the following commands
Now find your USB Drive. My USB Drive is Disk 1, so I will use that for the rest of the guide.
select disk 1
select partition 1
delete partition 1 override
select partition 2
delete partition 2 override
Do those steps until you have deleted all of the partitions. Close the dialog box. Remove the Drive, and you are ready to go with a new, fresh, unformatted drive.