I have been using a 256 gb sandisk sd card, which is almost full. I bought a Samsung 512 GB to use additionally, but when I insert the new card, it only says I have 2.5 available. I saw somewhere that you could put larger games on an SD card and pop it in when you are ready to play.

How do I fix this? The simpler the better; I am still learning the ways of the steam deck 😅