What is your backup when your primary file host fails?

Many publishers seem to rely heavily on a single file host or delivery method.

I'm curious:

What happens when your primary solution experiences downtime, removes files, limits bandwidth, or becomes too expensive?

Do you maintain:

• Mirror links?
• Secondary file hosts?
• Cloud backups?
• Telegram backups?
• Self-hosted storage?

I'd be interested to know how experienced publishers manage risk and keep content available for their users.

Looking forward to hearing some real-world setups.