How to setup the download site?

Hi!I really like this wyupdater feature, but i have problem.I use a free online website hoster (heliohost.org), i have a main domain, and bla bla bla 😀 But, i put my site adress "mabaomsi.heliohost.org/blay/%file%", and run the wyupdater, then says:Error trying to save file: Error downloading "http://mabaomsi.heliohost.org/blay/wyserver.wys": Error: (404) Can't found.I need to upload files?

Yes, you need to upload the update files to that location: https://wyday.com/wybuild/help/walkthrough.php

Also, if the free hosting is using IIS you need to configure it to deliver *.wys and *.wyu files: https://wyday.com/wybuild/help/faq.php#why404

ok thanks.And when its gonna be not work, then can i use some online cloud-systems, like Dropbox, MEGA.nz...?

If they support standard protocols like HTTP, HTTPS, FTP, etc. then yes. I believe dropbox does. It would be skeptical that a piracy site (like mega) supports direct downloads. Sites like that thrive on ad revenue.