I was getting this as an extra to throw in the drawer in case of emergency.
I'm actually using the Samsung Evo Select 256GB U3 $39.99 https://www.amazon.com/dp/B072HRDM55/ref=cm_sw_r_cp_awdb_t1_FxmADbHQQB5F9
I got 128gb and 256gb (256 is for my ps vita) cards of this which is rated u3. I don't know anything about sd card ratings, is this good?
Any micro sd will work. I got the one below. I have 2 in my N3DSXL (1 in the system ,1 in a flash cart), 1 in my Wii, 1 in my current phone, and 1 in my mom's phone.