after update Xbox One won't recognize USB drive

Same here mine is full of films which I watch via Xbox, before update worked perfect, now won't even be recognised by the console, yet still can by my pc, and it's usb 2.0 also

Yeah me too i had a PNY 128 GB thumb drive plugged into the console during the November update and it did something to it because it wont recognize it at all! It works on my PC,Laptop,TV,even Xbox360. Other thumb drives i have work and are recognized once you plug them into the Xbox one! I have formated the thumb drive several times to fat32 to nfs and still nothing. MICROSOFT OWES ME $70 FOR A NEW THUMB DRIVE.

Mine was connected during the update as well, though I don't know what that could have caused.  The drive still works perfectly fine on my PC.  It didn't even occur to me to disconnect it during the update, if that would have made a difference.

yeah mine works on my PC, TV, laptop,even Xbox360! I have tried all the tricks they suggested and nothing.

ok i got off the phone with tech support and we tried everything! Reformated my thumb drive on my PC and Xbox 360 and still nothing. He said hes opening up a case or something and sending it to the engineers! Still though im out $70 on the thumb drive and not sure if i to want risk buying another one and have it *** up again when the next update comes around?

The thumb drive may very well be fine.  I wouldn't buy another one until you have more information on the issue.  Obviously, there is something going on with the data drives and I am sure they are not all bad especially if they still work on other devices.

I thought xbox one only used usb 3.0 for drives ?

I believe it requires a USB 3.0 drive for game saves, but USB 2.0 drives work for streaming media.  At least, they worked before the update.

before update 2.0 external drive :-(

I connected a basic flash drive and it works fine.  Go figure.