Watch the video:
Timestamps:
0:00 - Explanation
0:19 - Can't delete Partitions on USB Flash Drives
1:05 - Selecting USB Flash Drives in Diskpart
2:02 - Completely wipe USB (Remove unremovable partitions)
2:15 - Delete partitions with Diskpart (When can't with Partition Manager)
2:47 - Reformatting USB Flash Drive
If you’ve tried clearing a USB Flash Drive, or other drive in Windows, but the entire context menu is greyed-out in Partition Manager - then this guide is the fix! By the end you will know how to format, and/or remove specific partitions that you can’t in Partition Manager!