Why won't my new Xbox Series X won't read 360 discs?

Hi, I hope you're doing great out there. I am an Independent advisor and I am here to help you in regard to your concern.

This will depend on the game. May I ask what 360 games you have?

Same here.

I upgraded from the ultimate pass on Xbox one X to the series X but it won't let me claim it on the series X.

Also Tetris connected won't open either.

Fair enough, a slow internet connection is as good excuse as any.

Be aware however that while that drive will work on Series X, you won't be able to play Series X games directly from it. Series X games will require faster access and read speeds. My understanding is that the Series X games can be 'backed up' on an external
drive and then need to copied/moved over to either the internal SSD or the External SSD's that will be available for the machine.

The Series X will read and play Xbox One games from an external drive though.

This is more than likely the power brick has failed. Same thing happened to my x360 and the reason I updated to Xbox one X. Time to update to a new console I suggest.

Either the next gen Series S/X models or XBox one S/X.

You won't look back, but will wonder why you didn't update earlier.

Yep you do know why right ?

Series x controllers are usb type c

If you try and use a xbox series plug and play kit you won't have a controller left or you won't have a working cord

Xbox one and ps4 used usb 2.0 not type c