Windows 10: USB Drive Not Working

I have Usb Flash Drive and when I plug it in it shows up then it disappears and says that it is not recognized. Please help is there an way to fix this? Ask questions if needed.

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help. USB drive isn't assigned a drive letter.

Any usb flash drive I plug into my computer isn't assigned a drive letter. The physical drive shows in the "safely remove hardware" but it doesnt show up in disk management. I have tried to populate the volume thru the safely remove hardware properties window and it does pop up in the list but it doesn't stay there. This isn't a format or assign a letter problem. It's more complicated then that. Maybe one of the services needed for usb drive management was disabled? Suggestions needed. btw external usb harddrives work fine.

 

USB boot for bios update

Did the first step. It already doesn't work. Note the capacities and drive letters M:/N: The HP utility is about to format my raid-1 volume containing my 2 750gb drives. It thinks it's the usb stick. I can not select any other drives in the HP utility. My 512mb usb stick is U:.

Any other suggestions?

 

How to reformat USB Recovery Drive

Part of the commands and results were missing from the image.

Open adminstrative command prompt and type or copy and paste:
diskpart
list disk
select disk #
(replace # with the disk number for the flash drive)
attributes disk clear readonly
exit


If the above steps work then you are set.
If the above steps fail then view this link for additional troubleshooting steps:
How to Format Read-only USB Drive Successfully?