Laggy Xbox Menu , Gamepass , Store

you need the ark game on gamepass pc as microsofts wisdom have ported over the console version with extra menus.

ark will only crossplay with xbox console to windows store/gamepass version

Well it's officially no longer a Preview Program issue.

I completely unenrolled from the Preview Program and performed yet another factory reset. Everything worked perfectly for a couple of days. I hear the "chime" noise when I hold the guide button, I can smoothly go between menus, everything worked great. Until
I started reinstalling all my games and Rock Band 4 DLC. Particularly while the Rock Band 4 DLC was installing (several hundred files, I should say) and I'm getting all the notifications about each song being ready to play after they're installed, I noticed
the lag came back. It's taking a good 30-45 seconds for my "What do you want to do?" menu to pop up and the "chime" noise that goes along with it is gone. Menus are laggy. I press down several times in the guide to get to an option at the bottom of the screen
and it'll freeze for a second, before jumping down there suddenly.

I'm really at a loss here. The console seems to work fine until I start installing things. And yet, everything is installed to my external, and I have the same problem when my external is unplugged from it.

Since you're a member of the Xbox One preview program, please be sure to report any issues you come across using the Feedback app and then post on our Preview
Program forums for further assistance from the proper folks.

Thanks!

I live in the UK and the menu is very laggy and issues connecting to the game at the start :/

Games from the Game Pass store and GamePass cannot be modded as they are encrypted, except via authorized mods obtained from the menu in-game in things like Farming Sim, Skyrim and Fallout