Review on Gigastone 8GB 20-Pack Micro SD Card: Full HD Video, Surveillance 📷 Security Cam Action Camera Drone, 80MB/s Micro SDHC Class 10 - Memory Bundle by Charles Russell

I bought these 5 packs because they seemed very valuable, but when I used them in my Raspberry Pi and updated the software, some of the update files reported data corruption or data loss. My 32GB Samsung cards had no problems, as did my 8GB Transcend. I tried the first Gigastone card twice, then the second card from the order with the same results.