Introduction
If you are data is not saving properly and you have attempted to remount your SD card and the problem persists. Have you placed your SD card into a different device and the SD card is not being recognized in that device either? It maybe time to change your SD card.
Use this guide to replace your MicroSD card or SIM card.
What you need
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Use the flat end of a spudger to carefully remove MicroSD/SIM tray from the phone.
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Almost done!
To reassemble your device, follow these instructions in reverse order.
Conclusion
To reassemble your device, follow these instructions in reverse order.