I really dont know if your sending fake cards randomly
I've tested your product on my PC and on my Smartphone. both with same result.
read is only 18mb/Sec and write is only 8mb/sec...
cant even detect its manufacturer and serial number ... and it has a sticker with 2017 at the back of the card..
This "class 10" microSD card is being rejected by my dashcam with error message "Please use a class 10 microSD card". It wouldn't be practical to send for a replacement. I just used my old (3yrs) 8GB class 10 card on my dashcam and it worked. I'll just use this on an old android smartphone (if I can find my old one). Disappointed frequent Lazada shopper.