Can you store database in iCloud

I would prefer to use iCloud. If not do you recommend dropbox for universal access?

Can you put the database on a NAS server?

Access to the QNAP NAS server would be local while on the LAN while I’m in my office but will be via QNAP cloud access when I am out and about

See Page 12 of the DEVONthink Manual (ver 3.6.2) where it says not to do that.

Not do what? iCloud or NAS

I want to move away from Dropbox, too intrusive and the support is terrible

read what it says.