Create reports for download files

Hi, I am trying to know how much time certain type of files (PDF, DOC, XLS, etc) have been download from a websites, i am searching everywhere found nothing, create segments not working.

I am able to see some information in behavior, download, but very complicate for a range of one month or year, and the search option work only for the one visible on the screen, not in the other.

Anybody know the solution for a simple question like that.

Thank you