I got my new Lg l90 a few days ago, and i noticed there is only 4 gb internal storage. I tried to swap internal sd with external using root external 2 internal sd, uni-init and XInternalSD but none of those worked. vold.fstab is different than any others i found so i dont know what to change. This is from my vold.fstab
Cant find any other way to do it so i ask for help 
Code:
/devices/msm_sdcc.2/mmc_host auto vfat defaults
voldmanaged=external_SD:auto