I purchased 2 new Samsung EVO plus 128 SD cards for my note 9. Due to problems with a previous card I checked that both worked in my gopro camera. All good.
Switch of the note 9 placed the card in restarted all good.
2 days later no card seen in phone. But it also doesn't work with the gopro or on a pc. Basically useless.
Do I try the 2nd card or is there a problem or is the Samsung card not compatable with the Samsung device?
I would recommend checking some of the threads on the forum to save time on waiting for replies as I am sure that a few others had issues, off the top of my head they often had things like making sure you format the SD card (via a pc doing a full format) and another talked about deleting any data folders left on it from another device. Let us know how you get on.