Review on SanDisk 32GB (Two Pack) Extreme Pro Memory Card Works With Nikon D3400 by Crystal Ford

I don't know if it was the card or the reader but I used it in my camera and then put the card in the reader and imported into Lightroom. Everything went well. But when I transferred some files to the card and plugged it into another laptop, I was told that the card needs to be formatted before use. I tried again on the first laptop - same thing. Just tried a card into the built in card reader in another laptop - same thing. Now I don't trust this card or reader at all. Edit: I did a read/write test and got horrible numbers. 16 Mbps on a laptop; 20mb/s on another. Must be fake cards.