Havent seen the Nintendo Switch branded SD cards this cheap before. Saw it listed on Amazon AU's daily deals. To be fair you could get a non Nintendo branded sdcard for cheaper.
For example:
https://www.amazon.com.au/gp/product/B073JYC4XM/ref=ox_sc_sf… $49
http://www.msy.com.au/micro-sd/20064-sandisk-sdsquar-128g-gn… $52 from MSY.
Please note this is a re-branded Sandisk Extreme Card with a Nintendo Switch logo, and it can be substituted with any other UHS-1 / UHS-l capable MicroSD card.
Rather get non-branded. No one is going to check what SD card you are using.