In a standard, Photoshop based image copy flow, image processing staff accesses to images on a GN4 server through a set of shared folders, accessible from LAN/WAN.
Every time when an user crops a image via crop destination, it creates a image in a "to-be-processed" folder.
Such folder has to be accessible to the Photoshop operators, via WebDAV or FTP.
Moreover, for every crop destination you may need a Back4 input folder to drop there modified images, and a Back4 error folder to be able to recall and fix a image that didn't pass through.
How many shared folders you need?
Assuming you have only one crop destination, you need three shared folders:
•A shared folder to get the cropped images from.
•A shared (hot) folder to put the processed images in the Back4 queue.
•A shared access to the Back4 queue error folder to be able to recall and fix a image that didn't pass through.
Should you have more than one crop destinations, and assuming they do not share the same Back4 queues, you will need three times as much folders as crop destinations number.