[Fourth Haruno]

Im using ES file explorer, it displays that im currently using 16gb of my storage to a total of 39gb, but with only 11gb avaialble, this numbers inludes my sdcard which is 15gb. my phone storage has a total of 32gb, but deducting the memory the os takes, it has a total of 24, it also shows a maximum of 24gb when I access it with my pc. what kind of situation is this and how to solve it?

[Rukbat]

It's not how much storage the OS takes, it's how large a partition was allocated for the OS. The OS could take 6GB, but the partition could be 15GB, and ou can't access that unused 9GB.

Install a terminal app, like Terminal Emulator for Android and issue the command

df

Look for a line with sdcard or emulated (or even userdata - it depends on the manufacturer) - that's your available storage. The other stuff is other partitions, used by the phone, and not available to you.

[Fourth Haruno]

im guessing that the terminal app would only display your total usable space, if so, would a factory reset remove these partitions because i still remember that when i have this phone for the first time it has a memory way more than 13gb. so im trying to take back the 12gb that is occupied by these partitions.