I have a lenovo g500 laptop. And my sd card reader has a problem. When i insert an sd card, it will detect and can read it but i can't write, delete files or reformat the card. Please help me…
Added (1). this is just my new problem. Because last year, the SD card reader has no problem. I can write, delete files and format it.
Make sure that the write protect tab on the SD card has not moved. I had one microSD to SD adapter whose write protect tab stuck out enough that it would catch on the slot when inserted and move it to the write protect position.
Otherwise at some point maybe you removed it without doing "Safely remove hardware" before it was finished writing and it got corrupted.