First of all check the SD card on your PC by using an adapter for the micro SD. Once this is confirmed we can be sure that the fault is within the phone. Try and format the SD card as some malwares or corrupt unrecognised files can fault the phone memory. now make sure that the Sd card holder is contacting, if there is no result before the phone can be taken for a consensus to the service center, try with another card.
Answers & Comments
First of all check the SD card on your PC by using an adapter for the micro SD. Once this is confirmed we can be sure that the fault is within the phone. Try and format the SD card as some malwares or corrupt unrecognised files can fault the phone memory. now make sure that the Sd card holder is contacting, if there is no result before the phone can be taken for a consensus to the service center, try with another card.