Having Microsoft xbox division upgrade the internal ssd for me

the internal ssd is soldered to the board, it is also none upgradable, and the cost of a larger drive say 2tb would be about the same cost as the series S console.

besides they would never do upgrades hence why they sell the exspensive addon cards that are of a proprietory make.

specifically, where - in the EULA terms - does microsoft say that replacing the internal HDD in an Xbox One will result in the console being banned from use with Xbox Live ?

is there distinction in the terms between an end user vs. Microsoft servicing the console ?

I still wish to upgrade to an internal SSD, in order to improve the overall experience with the gaming system. i've done similar upgrades on on other devices where an SSD replaced an HDD and gotten nothing but performance boosts.

if i do commit to this upgrade and the console does get banned .... there are always other options out there. for games like Halo, I can always look to the PC version of the game - otherwise we have no dependency on exclusive titles.

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.

Internal SSD i replaced my hard drive a SSD about 3 years ago

The Xbox Internal drive is not meant to be replaced by the end user. Doing so can risk your console being banned from the Live Network. Your self repair/upgrade maybe the reason for your fault. Either way, we can not help with this.

I personally keep the games I play the most on a SSD specially those that occupy a great amount of space. I keep small capacity games in the Xbox internal storage. SSD's are a great option, allowing you to upgrade your console existing capacity without
having to delete games or any other data you might have.