Here’s a short instruction for those who want to get a little bit more free space on Redmi Note 4 MTK system partition. You must have root on your device to continue.

Delete useless files in system partition on Redmi Note 4 MTK

This is useful for Official MIUI ROMs, usually custom roms are already come without these files.

Simply go to “сust/app/customized” and you’ll see a lot of useless trash .apk files. The approximate size 300 mb. You can simply delete all these files and enjoy more free space on system partition.