What solutions do you recommend for backups?

We do not provide an integrated backup service, but you can backup your data yourself, either by running a backup server on our infrastructure or using a third-party backup service such as rsync.net.
If you run your backup server in the same availability zone as the main server, you can transfer data between the two for free over a VLAN, but both would be affected by a catastrophic failure of the entire availability zone. On the other hand, you can survive such failures if you provision your backup server in another availability zone, but bandwidth between the two sites will be billable.