J. Foust
I have exclusively used Sandisk Extreme cards in my pro photography gear for years and they have NEVER let me down. This one is a dud, though. I plugged it in, let my phone format it, and then start copying to it. Everything copied just fine, but after I got done, that's when it started acting up.If I had my phone plugged into the computer and was using it as a storage device, I got tons of CRC errors and/or messages saying that I needed to format the card before using it. The phone would come up from time to time saying that I had inserted a blank card. If I reboot the phone, it works fine for a little bit, and the errors would start again. I thought maybe it was the way the phone formatted, so I tried to format it on the computer, but that didn't help anything.Very frustrating! Thankfully I've had it for 2 days before the trouble started, so it's going back to Amazon for a refund and I'll have to find a more reliable card for my phone.