Toshiba Trion 150 OCZ, I run a 480gb one of these and the speeds are definitely up there with 520 read and write. Unfortunately, SATA 3 is capped at 600mbs so that's about as fast as you'll get unless you have an M.2 slot in which case I'd recommend a Samsung 960 Evo (assuming you want to fully convert later). However, since you are just slapping Arma on it, a Kingston A400 would be well suited for ya for $28 lol. As for moving install folders, steam has made this quite painless, go to your properties and click move install folder.