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How Do I Fix TWRP “unable to mount data” Error and Internal Storage showing 0mb?

If you are experiencing TWRP unable to mount storage and internal storage showing as 0 mb, read through this guide for how to fix it.

Reminder

This steps will wipe or format Data partition and data will be reset.

Solution

Step 1: Confirm that internal storage became encrypted when using a legacy screen lock method. Go to Android device’s Settings > Security > Screen Lock and change screen lock method to either Pass or Pin. Create a new one.

Step 2: Reboot device into TWRP Recovery, enter the pass or pin you just created.

Step 3: TWRP will attempt to decrypt device’s internal storage. If it succeeds, you should not have further issues.

Step 4: Reboot device into TWRP Recovery again.

Step 5: Go to Wipe menu > Advance Wipe.

Step 6: Select Data and go to Repair or Change File System.

Step 7: Click Repair File System to see if this fixes the issue. If not, continue.

Step 8: Go to Change File System.

Step 9: Select Ext2 and swipe to confirm.

Step 10: Now switch back to Ext4 and swipe to confirm.

Step 11: Go back to TWRP main menu, then the Mount menu, and check if your partitions can be mounted now.

Step 12: If you are still unable to mount your partitions, you need to repair Internal partition, which will most likely wipe your internal storage.

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