Confluence is a wiki, you could probably compare it to Mediawiki (the software behind Wikipedia) or Sharepoint. While you can store files in it, it limits file sizes by default to 10MB.
Basically, while you could use it as a file sharing solution, this is not the use case for this software, and therefore is not a very good solution.
I would recommend using a proper file sharing service, such as Dropbox for Business, Onedrive, Google Drive, etc. You could then link this into Confluence using one of many different plugins that allow you to browse the contents of file sharing services.
Do you use templates with Confluence? Take part in a remote 1-hr workshop. You'll receive USD $100 for your time! We're looking for people to participate in a remote 1-hr workshop...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs