How do you test if a microsd card is fake on the steam deck?

Just got a 1TB microSD card from amazon and I want to test to make sure it's real. Steam Deck formatted it fine and says there is 937.5 GB but since cards can be made to report false size I'd like to check for sure. I first went to look for h2testw but it seems it's only for windows. I dont have a card reader so I cant just use h2testw on my pc.

Are there any programs or flatpacks you recommend on the Steam Deck to do the same thing h2testw does?