How can I upgrade games to X/S on external hard drive?

Not really...

Xbox Series X games / upgrades / updates has to be installed onto the Series X internal or expansion card SSD,

You can have Xbox One games on your external hard drive that will get an Series X upgrade but the games will need to be transferred to the Series X and then the Series X upgrade will need to be downloaded onto the Series X SSD,

As an example...

I have Marvel Avengers on my external hard drive that will get the Series X upgrade and I will transfer the game over to the Series X SSD ready to download and update the game to the Series X version when available.

Hi. My name is Brilliant and I am happy to assist you today.

Are you able to move the X|S games to your external hard drive or is it just the non X|S games you're having issues with?

You can check which drives work on Xbox X|S and see if yours is compatible. You can find more details here: https://www.lifewire.com/use-extern...#toc-what-drives-work-with-xbox-series-x-or-s

I hope this helps resolve your issue.

Will any external hard drive be able to run x/s optimised games ? HARD DRIVE not expansion card

Ive had an original xbox one for a while and just upgraded to the S. My issue is that i have an external 1TB hard drive that goes in the side id the xbox, is there any way i can transfer all my games to the S without having to download them all
individually? I do not think the original xbox’s external hard drive can mount to the S.

You can move your games to the external if they fit and just plug it in to the s on the back

Hi,

Current external hard drives are USB 3.0 5,400 RPM mechanical hard drives. These drives are very slow compared to the Expansion card. You won't be able to run Series X/S games from current external hard drives, not even the 2.5" external SSD drives either.
But, you will be able to archive your Series X/S games to these drives to save downloading again.

The expansion card can run all compatible Xbox games. Which will be Series X/S, Xbox One and the BC Xbox 360 and original Xbox games on the BC list.

Xbox One and other Backwards compatible games will load a lot faster on either the internal storage or the expansion card than they would if you ran them off your external hard drive.

Microsoft has a video on YouTube showing 'The Outer Worlds' loading in just 11 seconds on a Series X/S SSD, compared to nearly 60 seconds on Xbox One.

https://www.youtube.com/watch?v=_wCX0n9Jci4

I see. So how would i be able to transfer everything i have on my old hard drive to the new expansion card?