Your SD card has bad sectors or read / write errors.My sd card not reading: QA SD Card reading errors or incorrect file system format t Micro sd card not detected by phone: Questions - answers.Check the card for physical damage and if you see any, buy a new one.Connect it to a PC through a card reader and check for errors via chkdsk app.Check compatibility if your card has never been used with this device before.MicroSD card not recognized because of application error.SD card has loose springs or lost tracks of the socket (broken memory card).Memory card is not compatible with your mobile device.
SD Card reading errors or incorrect file system format t.