appears to be a file hosting service similar to others like Rapidgator, Uploaded, etc. A "premium downloader" typically refers to tools that attempt to bypass premium account restrictions or generate premium links without payment.
Websites claiming to give away free premium username and password lists are usually phishing traps or share dead accounts. Fileaxa Premium Downloader
: A free tool that allows you to paste a Fileaxa URL and generate an unrestricted link daily to boost speed. Fileaxa appears to be a file hosting service
: Increases the daily limit to 120 GB and provides 2X the speed of the Lite plan. Fileaxa Premium Downloader