I noticed recently that my Global Inbox was not syncing using Dropbox. Nothing was working that I read in the forums, and I realized I had an indexed folder (ironically, a Dropbox Folder!) in my Global Inbox. So, I removed it and the sync worked again.
How can I setup an index folder for a Dropbox Folder outside the Global Inbox? It doesn’t need to sycn with any of my other databases.
You can index into any database via File > Index Files and Folders.
However, I suggest you don’t do this without reading and understanding the In & Out > Importing & Indexing section of the built-in Help and manual.
Thanks. I’m indexing a Dropbox folder because I don’t want to increase the size of my database-- the Dropbox folder is huge and I don’t want to sync. It sounds like I could import the folder into a separate database and not sync. Importing copies and doesn’t move files, correct?
Was there something you wanted me to see specifically?
Correct. Importing copies; indexing links.
Was there something you wanted me to see specifically?
Yes. All of it 
People need to understand the ramifications the connection between DEVONthink and the filesystem when using indexed files.
I’m indexing a Dropbox folder because I don’t want to increase the size of my database-- the Dropbox folder is huge and I don’t want to sync.
May I ask why you’re indexing such a huge Dropbox folder?
I wanted an easier way to search and organize or view files and find common files quickly. I don’t want to use DT3 to launch and edit files.
If files are copied, does that means that I’ll always have two versions of a file-one in DT3 and one in Dropbox?
I wanted an easier way to search and organize or view files and find common files quickly. I don’t want to use DT3 to launch and edit files.
Note DEVONthink isn’t a Finder or Spotlight replacement.
If files are copied, does that means that I’ll always have two versions of a file-one in DT3 and one in Dropbox?
Yes, of course… unless you choose to delete one or the other.