external micro xbox series s

This article explains the difference between using a regular external hard drive versus the custom external storage for the Series S/X- https://news.xbox.com/en-us/2020/09...xbox-series-s-custom-storage-solution-primer/

An external hard drive used on the One will work for the Series S/X, but won't have the exact same performance as the one created for the Series S/X.

You should be able to do that, yes:

"Power down your Xbox One.

1. Unplug the external drive.
   
2. Connect the external drive to your Xbox Series X, S.
   
3. Power on your Xbox Series X, S.
   
4. Wait for the external drive to be detected. This may take a couple of minutes.
   
5. When the drive is detected, you are free to copy any games you want onto the Xbox Series X, S internal storage."
   

Taken from here:

https://www.windowscentral.com/how-transfer-data-xbox-one-series-x-series-s

So if i buy a external storage hard drive for an xbox one and use it on the series s it will run just as good as the one designed for the series s and seriesx?

short answer: yes

long answer: How to expand Xbox Series X, Series S storage with an external drive | Windows Central

Get a PS5, problem solved. you can play games on external sdd no problems attached

You cannot store or play PS5 games from an external drive. At least with the Series X/S consoles, you can store the Series X/S games to external drives. You just have to move them to internal storage to play them. You can play PS4 games from an external drive hooked up to a PS5 though, just like you can play Xbox, Xbox 360, and Xbox One games from an external drive connected to a Series X/S.