Assassin's Creed Valhalla Cross Save, what should I buy?

ma
- in Xbox
1

I bought Assassin's Creed Valhalla for the XBOX One because I thought that my AMD R5 3600 and my GTX 980 ti are not necessarily completely sufficient for the highest graphics and the best gaming experience, I already had my problems with the last two parts. Nevertheless, I saw in some videos that you shouldn't have any problems with the setup. Since I've already bought it for the XBOX One, but have read about Cross Save, I wanted to ask what exactly do I need for this Cross Save? Do I really have to buy the game on PC and XBOX in order to play the same score on both devices or is there a possibility, as with the XBOX Game Pass, that you simply have to have the game in the Microsoft Store or here at Ubisoft Connect, and then can play it anywhere?

Hope you understand what I mean.

ca

Unfortunately you really have to buy the game separately on XBOX and PC. So it is not enough if you only have it once.