Android Storage Grab
Force the reset and Grab to happen again... After it has grabbed the storage, use this command in Terminal emulator to find what has been added recently... go through them 1 by 1 ...

Also you can use Sort to Sort By Size, and locate the larger files on your Internal Storage... 

find /storage/sdcard0/ -mmin -1 (mins)
find /storage/sdcard0/ -mtime -1 (days)