How to pick the right memory card
Question 1: which device? Nintendo Switch / Steam Deck = microSD A2 V30 (faster app launches). Smartphone = microSD V30 with A2 class. Action cam / drone = V30 or V60. DSLR/mirrorless for stills = SD UHS-I or UHS-II. Video camera for 4K = V60 (microSD or SD), for 8K or ProRes = V90. Question 2: capacity? 32 GB = Switch save slot, 64–128 GB = smartphone, 256–512 GB = action cam with 4K capture, 1–2 TB = professional photo/video production. Question 3: which speed class? See table below.




