i’ve had my MicroSD for about one year atm and all of a sudden it became unwritable. the files stored on the SD are not to be deleted and when a new file is stored on the SD it vanishes after about 30 seconds to a minute… i tried formatting it again to exFAT but every time i do the files will show up gain after about a minute. I do not know much about MicroSD Cards so i thought maybe someone here might be able to help me out.
the card seem to be locked in read only mode. this occurs when the controller detects a problem with the card. It locks in read only mode to prevent data loss. there is not anyway to unlock the card it will need to be replaced. Contact sandisk support for warranty replacement.
I too have the same situation. I can delete everything off the card and then it all appears again as if by magic. I cannot format it in Windows as it says “Windows is unable to complete the format”. If I try to format it in SD Formatter V4.0, it says “The memory card is write-protected” (it isn’t).
Update: I chatted with a SanDisk representative and they agreed that I send the card destroyed. You must ask for permission to destroy the card before sending it back. A printed confirmation email will need to be sent together with the destroyed card.
