SANDISK 1TB Extreme microSDXC UHS-I Memory Card with Adapter - C10, U3, V30, 4K, 5K, A2, Micro SD Card- SDSQXAV-1T00-GN6MA

no its offbrand no it work work for a standard 3ds/2ds and no dont trust it. if your country allows it i would get this off of amazon https://amazon.com/dp/B09X7C7NCZ (standard 3ds 2ds only) if you have a new 3ds/2ds get this https://amazon.com/dp/B0G8L1RNPF and for your switch. this https://amazon.com/dp/B09X7MPX8L something important to know is the 3ds/new3ds lineup take a while to load with bigger cards. and your never using 128 or 64 gigs on a 3ds anyway as its games and homebrew are ᴛɪɴʏ switches dont have the 3ds problem so go as big as you like.