I’m [still] having trouble importing from my ScanSnap ix500 into a selected group within DT3 v3.0.4. This issue was reported earlier, back in May 2019. At that time it sounded like it was going to be investigated by the Development group. I haven’t seen any mention of a fix in the release notes so I’m assuming this is still an open issue.
My ScanSnap software (ScanSnap Manager v6.3 L70) has OCR turned off (Convert to Searchable PDF is unchecked) and DT3 is set to convert incoming scans to searchable PDF. In DT3 Preferences > Import > Destination is set to “Select group”. All the incoming scans are delivered to the global Inbox, even though I’ve specified a target group in the DT3 window that pops up during the import process.
Interestingly, if I turn OCR off in DT3 and on in ScanSnap Manager, the scanned file goes to the group I’ve selected. This matches the behavior reported by @rundeg last May.
I’m running macOS High Sierra (v10.13.6).