Multi Pak Files

why nobody want to help with this case this is so rare, just a simple question how its been done
seriously i post this question at facebook and some guy by his photo seems like a real hard geek post me a deal for what propose this thing used what the is matter for what is it this, by this answer this done my day relay i ask a question not 10 Million dollars just a simple question
even epic games don’t know how to help me in this case?