About 3 years ago, I got a Sandisk Ultra 64 GB micro SDCX. I was able to use it with no problem. Then one day, I noticed something was wrong when I tried taking photos with my old Samsung GS4. It would not add the new photos that I attempted to take. Instead, I would get a generic white picture of a human with a lightening bolt on top of it. I did not know what caused it. The only thing I can think of is maybe when I took it out of my phone and put it in the sd card adapter to use for my digital camera, maybe it reformatted it. I don't know if it is the chip itself because I don't see any chips or damage to it. The only thing that I know about the micro sd card is that it will not recognize new data that is added to it, and it was not recognized adquately by my phone. I can still extract the remaining data on it and it will read on my computer.
I now have a GS 7 and would like to see if the chip is salvagable. I don't know if my phone can format it and fix the problem, and I don't want to risk messing up the phone as a result of the card's unpredictability. I have not put it in a phone for about at least a year due to it being unuseable. My question is: Can I save this mirco SD chip or is it a lost cause? If it can be resolved, will it be a simple or complex process? Thank you.