i found out when this 0MB issue happened, the data partition are f2fs. However, when i set to ext2 then ext4, the 256Gb storage comes out showing again, so i need to re-install OS(xiaomi.eu). After that, it will be usable again, until i perform factory data reset. When i press factory data reset, again it will just loop me in twrp with the f2fs 0MB issue again.
i guess it must have something to do with the partition type. does the xiaomi.eu_NUWA_OS2.0.212.0.VMBCNXM_15 ROM supports EXT4? Is there a way to make it not to mess up when i press 'factory data reset'? I don't mind whichever partition type i use, ext or f2fs... Cos i'm gonna sell the phone & only wanted it to be global ROM. Don't want the new user to face issues when 'factory data reset' is choosen.
Installation in Miflash: Try using this version of Miflash: https://www.mediafire.com/file/99tudj9roum1kpo/MiFlash_2018.5.28.0.zip/file This version does not install, you just run it. - Download stock fastboot ROM (tgz.) https://hyperos.fans/en/devices - Extract and paste in the root of C...