There's nothing to install, and nothing extra to pay for. Bring your personal or Business G Suite / Dropbox account, and we'll let you choose a free subdomain.
...depending on your cloud storage provider's plan. Hosting 1 file or 1 million files? No problem. The Free plan includes 500 requests per month.
Out of the box, you'll get:
Upgrade to a PRO plan and get access to: