Let us change hdd to ssd on Xbox one s/x and lower...

It's because the Series S/X are new gen. They require the xbox SSD. You are using an HDD. SSD's are way faster than an SSD, the series s is trying to run the 120fps and higher graphics. Thats why they are telling you to move the games. It wants you to play them on the internal SSD storage.

Series S. it seems to be any game. I haven’t found one I can play directly from the hard drive yet. In honesty I haven’t tried many but seemed odd that I haven’t found any yet?

The only games that would be directly playable from an HDD would be Xbox one games.

Xbox Series X/S games can only be stored but not played from an external HDD. Those can only be played from either the internal ssd or one of the WD or Seagate expansion ssd's that plug into the back.

The reason is the Xbox Series X/S games are setup to take advantage of the speed of the internal ssd. For comparison Internal SSD has raw read speeds of 2.4 GB/s whereas HDDs would only be a max of 500 MB/s.

Hey Milo, unfortunately HDDs are incompatible with Series X/S games. You will have to shell out the several hundred dollars for their SSD card to expand your X/S storage. You can, however, play Xbox One and 360/Classic games with an HDD, hope this helps.

the one x comes with a standard 2.5" mechanical drive. the only thing that changed with the hdd specs from the xbox one s and x is the x uses SATAIII where as the one s uses SATAII.

The One X came with an HDD, not an SSD. The Series X/S are the first consoles with an SSD as standard.

The original OP was asking about visual game quality differences on an 1080p HD TV between the original Xbox One and the Xbox One S, which there wouldn't be any in their case. It was mentioned that the One S was a revised version, being smaller, no power brick and having 4K in certain scenarios, but not worth the upgrade if they were thinking it gave them better graphics.