My important data is backed up via Synology DSM Hyper backup to:

• Local external HDD attached via USB.
• Remote to backblaze (costs about $1/month for ~100gb of data)

I also have proxmox backup server backup all the VM/CTs every few hours to the same external HDD used above, however these backups aren't crucial, it would just be helpful to rebuild if something went down.

As I have all my data on my homeserver in VMs it’s currently only daily backups to the NAS with proxmox, but I should really add some remote NAS to have it backed up in case my local NAS breaks down.

I have a central NAS server that hosts all my personal files and shares them (via smb, ssh, syncthing and jellyfin). It also pulls backups from all my local servers and cloud services (google drive, onedrive, dropbox, evernote, mail, calender and contacts, etc.). It runs zfs raid 1 and snapshots every 15 minute. Every night it backs up important files to Backblaze in a US region and azure in a EU region (using restic).

I have a bootstrap procedure in place to do a "clean room recovery" assuming I lost access to all my devices - i only need to remember a tediously long encryption password for a small package containing everything needed to recover from scratch. It is tested every year during Christmas holidays including comparing every single backed and restored file with the original via md5/sha256 comparison.

I'm moving from rsync+duplicity+borg towards bupstash

Backing up to backblaze with duplicacy

All of my servers have shell scripts that rsync important stuff to a subdirectory. Other scripts run database dumps a couple of times a day.

My primary server at home then rsyncs my servers' backup subdirectories to its own, broken out by FQDN.

Leandra then uses Restic to back everything up (herself as well as the other servers' backups) to Backblaze B2 on a two year cycle.