Well, there is already a CDN guide and a complete manual published by the UNA team:

1. https://unacms.com/wiki/global-settings#storage
2. https://github.com/unacms/UNA/wiki/Remote-Storage

I recommend keeping a copy on a local cloud storage server. Mount that folder on your UNA compute cloud server as /una/storage, and then integrate your CDN solution so that files are delivered from there onward.

Do not rely on the local storage folder directly on the UNA application server in production this can significantly slow down the system. That setup is only practical for testing, not for a live environment.

For production, you should ideally run at least three separate cloud servers: one for the UNA application, one for storage, and ideally a third one dedicated to databases. For testing purposes, however, it’s fine to run everything on a single server.

It’s not recommended to run UNA on a single VPS or even on a single dedicated server. In fact, running separate VPS instances for each application still introduces multiple points of failure.

Instead, you should rely on cloud infrastructure or dedicated server clusters. A proper production system should have at least three servers in a cluster in order to minimize failure risks and ensure redundancy.

Any production system without redundancy is destined to fail, it’s not a question of if, but when.