I have a 128 gb sandisk mirco sd memory card in this s9+ and i bought a 256gb sandisk micro sd i'm worried that if i put that in my phone that i'm going to get the same error message and that it will ***** up my card.
I have an unlocked S9+ and am having same issue. I have a 128gb sandisk class 10 card. I moved it over from my s7. Everything shows up and I'm able to save to it. I just randomly get the error message.
Has anyone tried moving their stuff, formatting the card, and then moving it back? I thought about it, but thought I'd check to see if anyone else had done that before I took it that far.
I have not tried to move but this is my exact scenario. S7 128gb to s9 plus unlocked and the random error. Granted since the wipe the issue is not coming up all the time anymore but sporadically. And the amount of times has decreased.
I hope I am not speaking too soon, but the following appears to have worked for me. I am not sure which part caused the success but I suspect the whole problem was caused by removing the card from my S7 while it was turned on. This means it was not 'properly ejected'. Then putting it straight into the S9 threw up errors UNTIL I did the following (please read step 9 before doing any deleting!):
So far so good. If the warning comes back I'll update.