[mst]

I haven't had any issues with any of my SD-cards so far. I only use Sandisk cards, though, and after I learned the lesson the hard way, I buy exclusively from very trustworthy sources.

I have one "Sandisk" Ultra that showed issues after several months of use. Checking the card carefully it turned out that the write and read speeds of that card were way below specs. It's very likely that this card is fake and just relabeled as Sandisk.

So, you should maybe check where you bought the cards and if they are original Sandisk.