The only difference I could find is that the bluetooth one is officially switch compatible and the other one isn't. I have the old wireless one with hall effect sticks and had no issues with it on pc, android or steamdeck.

I've bumped into this issue top and now I do the following: Solve them very slowly, make a few mistakes and correct them and switch to another tab for a few seconds before submitting.

There is a mouse smoothing option that's i think in the gameplay settings. Turning that off helped me with motion sickness. Also make sure you have a high refreshrate monitor with adaptive sync and try to keep those fps high. For me once it goes below 90 it tends to get bad for me but above that i'm fine. I don't see/notice a big difference between for example 60 and 90 (60 still seems fine to me) but my stomach disagrees.

Largest one I ever did was around 4.something TB. New off-site backup server at a friends place. Took me 4 months due to data limits and an upload speed that maxed out at 3MB/s.

I have 150+ in bg3 and the majority of it is in a co-op save (110-ish hours) and we still haven't finished the game.

What level are you atm?

Make sure it's in AHCI mode and not RAID. It's probably a setting under storage, at least on newer ones it is.