Running Steam and CS2 via Heroic on external ssd

I am trying to install Counter Strike 2 and other windows games on my external ssd in heroic launcher.. but i am facing issues while installing steam.
1. its showing- unexpected checksum of downloaded file while i was instaling wine mono (which it said was necessary.
2. I wanna store as much of it in an external drive as possible, as i am running very low on internal storage..
3. Also can anyone help me out with installing Counter Strike 2, what are the wine requirements, wine prefixes and game arguements to have smooth gaming on Mac Book Pro M2 with 8gb ram.

I am new to thesse kinda things so i need help asap.. thx