Are you not able to use external ssd with series games

This has been covered and been mentioned as it has been a big concern. Right now, yes you can use your external SSD to play Xbox One and Xbox 360 games but you will not be able to play stored SX games on the external SSD. To be able to able to play SX
games they need to installed on the Series X's SSD not the external one.

A normal hard drive or SSD won't work with Series S/X games. They can store them, but the games won't run from them. They will only run from the internal drive or an expansion card that is made for the Series S/X.

You can.only.use storage.cards anything else would be too slowrunning at 500mbps vs 4.8ghps a storage card would.be

You can or should be able to use it for the Series X but i don't recommend running your games from it,

as you wont get the fast loading or fast travel time of what the Series X custom NVMe SSD is capable of,

It's best to use any external HDD or SSD for just game storage and transfer you most played games onto the Series X NVMe SSD.

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.