I inserted my 8GB microSD card into the device and after a reboot the card became Phone Storage while the real phone storage partition became external SD card. Once I remove the micro sd card from the phone it will become unbootable. I'll have to fix permissions in TWRP recovery in order to boot, and then the Phone Storage will be correct again. But if I insert the microSD card once more it will still become Phone storage. I tried formatting the sd card to fat, ext2, ext4 but with no help.

External SD card (8GB) became Phone Storage

Phone Storage became SD card

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