We are bringing basic info from one app into this one, but we have additional detail workflow that we need to import into the synced table. It appears that both import/export and pasting into a grid edit report do not work. Any ideas?
I've created a spreadsheet with the new additional data (with the key field), then saved as a CSV and dumped in my Google Drive sync folder. QB will grab all csv files for importing. This assumes you're sync settings are for 'add and update'. Does this help?