MX4 pro 32 Gb internal storage issue

Hello, I just got an mx4 pro 32 gb rom with 4.1.1 A and i did an apdate ( clear data also applied) to 4.5.7 A.
In both versions my available storage is about 14G , 5 Gb system apps & 12 Gb are being used by ‘‘others’’.

How can i get all the avalable space of my phone? (ideal about 27 GB)
How can allocate and delete the ‘‘others’’??
Please help…

Take a look in the Security app, maybe this could help to see what is eating your storage.

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