Use destination folder permissions or Set no access
Whenever new items are being uploaded, created or moved to a new destination, Admins and Managers get to set permissions for it. They will have the choice to Use destination folder permissions or Set no access.
Note: Content uploaded, created and moved items by Contributors always use the destination folder permissions from the destination folder.
Best practice for buyer specific folder setup
1. Create a dedicated folder for each buyer group in Other and use neutral names
2. Set permissions at the folder level
3. Upload documents only in the correct buyer folder