I’m already backup up my databases located in a database folder using Arq, but I just figured out that my Global Inbox database is located in another place: /Users/stig/Library/Application Support/DEVONthink 3. So I guess I need to back up this one too?
What folders are you backing up, am I missing something?
Don’t you regularly back up everything anyway? You should.
I don’t specify specific folders; just generally my Mac
Well, I do both. But my global backup with Time Machine is on an external disk and it backs up only when it is connected. That’s why I also backup up selected folders much more frequently in the cloud(OneDrive) so I’m sure my most important docs are continuously backed up.
Your databases – ideally located in the Databases folder in your home directory – and our Application Support folder should be sufficient.
Thanks. Just added it to my backup plan! I have always wondered where this Global Database was located. Maybe it would be an idea to add this info under the backup info in the Help documentation.
Are you sure backing up to OneDrive is a sufficiently secure backup for you? OneDrive is a “sync” service so changes on either server or local get replicated to the other. Hence if a flaw or deletion (deliberate, deliberate but regretted in future, and/or accidental) happens, that state is replicated to the other. Poof, backup gone. Not what real backups do.
Just saying …
Thanks for your concern! Arq backup software offer this as a location for backups. It is being uploaded directly to the cloud and is not synced with my local OneDrive. I’m really not sure if this is good enough 
If not synced, then I guess I’d go with it. I don’t use Arq so I didn’t know that.
On my two Macs, I use TimeMachine (running continuously backing up to two USB drives), Dropbox Backup, BackBlaze (may drop it if Dropbox Backup keeps working fine), and CarbonCopy Cloner to a NAS for “really important stuff” 
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Yes, perhaps over the top, but over the years I’ve had to recover from backups more than a few times.
Another vote for Arq; I use the Premium version which provides their own cloud location
I’m satisfied with a local backup copy, and a cloud copy (Backup 3-2-1)
I too use Arq and also wanted to have ALL databases (including the inbox) at one destination. So I moved the inbox db to my general db folder and linked the file to the application support folder (if symlink suffices or hardlink is required) I cannot say as I’m not at my computer at the moment.
While this is technically permissible, we generally don’t advocate doing this. Just so you know.