Fix bootloop E:failed to mount /efs (Invalid argument)”

Requiments :

Twrp or phone with rooted status,

Terminal ( use from twrp or adb )

write this command from twrp / terminal adb :

cd /dev/block/platform

ls

cd sdhci.1( if not work, use  cd dw_mmc)

ls (if enter this command, will show folder  by-name)

cd by-name

ll[LL] (if not work, use ls –l, and find the efs partition, efs on samsung ace 3 partition efs identity as mmcblk0p15 )

mke2fs /dev/block/mmcblk0p15

mount -w -t ext4 /dev/block/mmcblk0p15

reboot