Weird, I have a regular old 2TB (or maybe it was 1?) western digital plugged into the USB on the back of my series x and it works fine, not sure I understand the need to spend a bunch on something like this. Edit: and before responding about speed… I haven’t noticed much, if any, difference in game performance from installing on the drive or external outside of the initial game loading (startup) time, so not sure if that’s the only benefit to using the expansion slot.
Hmm I’ll have to check this later as I don’t remember ever running into that problem since my Xbox internal has been full for a while. But I also wonder if that applies to physical copies or not since all my series x games are physical. Unless Xbox does this automatically in the background without user intervention, then I may have not noticed