if I buy a game disc for xbox series x, can I use that disc on my xbox series s?

Hi,

Are you planning to upgrade your monitor to a higher resolution model like 1440P or 4K?

Do you have these games on disc or as digital purchases?

The Series S has no Blu-ray optical drive so if your Xbox One games are on disc, you'll need to buy them again on the Series S. If the cost of re-buying your games is going to be expensive, then the Series S isn't for you. You'll be better off with a Series
X as you can use your current owned disc games on that straight away.

I'm getting a Series S on launch, I only have a few disc games, but the main reason I went for the S is because I couldn't get an X on pre-order day. But I do intend to replace my S with an X later.

Thank you for the reply.

The FAQ states the following:

• If you’re playing from disc on Xbox Series X|S, you’ll need to keep the disc inserted to play that game.
  

This implies if I bought a disc and installed on my xbox one, I would require the disc to play on my Series S. However the Series s is discless. I don't understand how a physical disc can state smart delivery for the Series S.

You have names mixed up. There are no consoles named the Xbox One Series S or Xbox One Series X.

The Xbox One/One S/One X all have a disc drive.

The Xbox One S All Digital Edition does not have a disc drive.

The Xbox Series X has a disc drive.

The Xbox Series S does not have a disc drive.

All the consoles can play backward compatible games. The Series S and One S all digital edition can only play games digitally downloaded.

The other consoles can play games from disc and from digitally downloaded,

I hope this clears things up for you.

series x has disc drive and the series s does not

smart delivery is so it downloads the content for the specific console

hence why the game case has series x and xbox one advertised on it. the disc can be used in series x and xbox one consoles, the series s does not have a drive therefore requires digital purchase.

This is an incorrect assumption. You can insert an xbox one disc and download updates that may improve visuals and frame rates on Xbox Series X/S but in order to play you still need the disc unless you own the digital version of it.

Xbox Series X will utilize the Xbox One X version of enhancements while Xbox series S will use the Xbox One S enhancements.

You will not get a free game by borrowing or renting a physical version of a game and installing it on Xbox Series X/S.