This should work as a storage device for most android phones. The card itself is About the size of a SIM card so if you got a converter (something to make it about the size of a normal SD card) you should be fine to use it on windows.

Well, I don't think so. The title says "For Nintendo Switch", and I don't even know how small (or big) the thing is. Your best bet is to search Youtube.

It’s fast enough. Your internet speed is more important

Yes you can use it a micro sd is a micro sd

It can also save screenshots and videos 

Yeah but I think there is a different place that you have to put it instead of the normal Nintendo Switch which is under the kick stand

you should be able too but there has been accounts of others not working.

It really depends on the games you wish to put on there. As an example, I was able to fit all of Bayonetta, Monster Hunter Generations XX (with all DLC ) , Sonic Mania, Crash Nsane Trilogy, Musicnyx, Minecraft, Hollow Knight, Okami and a few other small indi games before I was down to my final few gigs. I would recommend getting the bigger memory as the switch really is at its best with more memory for portable gaming. In short, a 64 gig card could fit up to 4 full games and a few smaller ones. IF the list I gave you above is all you need I’d just get the 64 and update when you need to.