I usually make a copy once a month of my database, I save it on an external hard drive that I can connect via USB, it probably is not the most practical way but at least it is the best way that is found

I manually copy it to my phone, a thumb drive, a cloud service and another computer whenever I change something. I also let the filename show on which device and on what date the files was last modified. Example: Passwords_MY-SMARTPHONE_260314.kdbx

When I was still using it I used Syncthing to distribute copies to multiple devices and that distributed nature also functioned as a backup.

Several flash drives stored at different places. I update them either once every three months or when I make an incredibly important change to one of the entries in the database.

I copy it to external hard drives. It also syncs to other devices via Syncthing and Syncthing-Fork.

I manually copy it to Proton Drive and access it via android with KeepassDX

Syncthing folder for the databases. Keep an additional key file on a separate storage and memorize a long password.

Yunohost + Nextcloud

Webdav (of my mail provider)

I have mine on a nas server synced with nextcloud.

I backup the file to a separate ssd on a different machine every few days and then backup on a USB in a fire wallet every few months.

Syncthing between my phone, my server, my laptop, and a cloud backup. Home server is always on so it “remembers” the sync to propagate to devices that were not turned on or connected to the internet when the change was made, cloud backup in case of catastrophe

Syncthing.

I also will make a copy on a usb drive if I’m traveling and keep it in my luggage. Lesson I learned when I broke my phone during a recent trip and didn’t have any way to add a new device to syncthing to retrieve my keepass database. Which was a real pain in the ass.

Syncthing. It’s not so much a backup as redundancy, though.

I have machines in the network that rarely get powered on, however, so I could possibly consider them offline backups.

Manually make a backup with the date in the file name stored in another folder and on a thumb drive.

All my systems backup to a remote box that has a hotswap bay that I rotate the drive every few weeks between another drive. The drive out of the hotswap bay is stored in a fire safe.

This is more all for images and documents, but everything gets the same backup since it’s whole systems. The backups are rsync with hard links so they take up less room.

I keep multiple dated backups made using a script shell + crontab, to automate the thing.