Sync database creates lots of duplicates with indexed folder on apple icloud

[BLUEFROG]

it sounds like DropBox is the preferred method for syncing secure DT3 data outside of my private network.

But do you actually need a remote sync option?
Please read and consider this forum post…

Sync Types Explained

First Questions Sync is simple but you need to choose the type of sync method to use. Regarding syncing, the first question you need to ask yourself is, “Do I need a remote sync option?”. Consider these questions… Do you need to sync between machines – especially desktop Macs – in different geographic locations? Do you have a colleague, assistant, significant other, etc. that needs frequent updates to synced data? Are you using a shallow sync, i.e., Download Files: On demand in DEVONthink To …