My Switch OLED doesnt recognise my new 512 GB microSD:

microSD card can't be read
The card may need to be formatted for this system,
or it may be damaged. Formatting erases all data.
Card: 512 GB - status: not mounted
This happened after i moved games from my old conosle. i dont have anything important on it yet, but i wanna know if its teh card or the console before i buy something else. Any tips?
im not in a rush, but Id like to buy teh right thing next time. if anyone can explain what to look for in a card, that would help alot.
ive read conflicting advice online, so Id really like to understand whats going on bfeore i do anything that cant be undone. any guidance is welcome. im about to throw this thing out the window lol