Hi guys.
My solution is simples. but you will LOSE EVERY FILE on userdata.
Step 1: Install TWRP
Step 2: Go to Wipe box
Step 3: Select Advanced Wipe
Step 4: Check "DATA" and tap on "Repair or Change File System".
Step 5: Tap Change File System
Step 6: See original format on file system (In my S6...