A:Answer Yes, you can remove the M.2 PCIe SSD but make sure (obviously) you get another M.2 SSD. The capacity is completely up to you, if you don't plan on storing a lot of files, a 500GB would be ideal, if you plan on using this for gaming (which I wouldn't recommend) get a 1TB for storage, games and your OS. When having an SSD you want to make sure you always have at least 20% open and unused so it doesn't slow down the boot and everything else.
