Are you adding image files to a folder and then need to see them in FileMaker or are you inserting image files into container fields and then need to see the same image appear in a designated folder?
This sounds very similar to a project that I am currently working on and which must run in FileMaker 10 on Windows. The users can add image files to a folder inside their documents folder and then FileMaker imports the images into container fields and then exports the images out to a shared directory on a file server, updating the container fields to be "by reference" container fields that refer to the copies of the files that were exported to the server.
I use batch files to delete files from the "in box" folder and to manage sub directories (only one level) within the shared directory on the file server. A batch file even maps the shared directory to a specified drive letter so that each user is assured a valid file path for the "by reference" image files.
Adding image file to a folder. Preferably I can get FM to read the folder on startup and auto add any new image files without changing any other data. There is no server involved, just a local machine. I just want to keep track of which photos have been submitted to which agencies and what their response was. Part of the submission routine (from Adobe LightRoom) is to save a small version of each file submitted to the default folder that FM will be addressing.
To read the folder contents of just any folder on your computer requires getting a plug in. But reading the contents of a folder located inside your computer's documents folder is within FileMaker's native capabilities.
You may or may not need to list the contents of a folder, however.
Using FileMaker, you should import or insert (Two different operations that can produce the same results) the image files "by reference" in to a container field such that you have one image file in each record in the table. Using the "store a reference option", the resulting container fields contain the file path to the image. You can open and examine the image file's image directly from FileMaker.
What I've set up is a two folder system where I use Import Records | Folder to import all image files from a designated "In box" folder into records in a table in the database. I then use a looping script with Export Field Contents to export the contents of my container fields into a designated folder for storage purposes, re-inserting the image file by reference from this new location in order to update the container fields to reference this new copy of my files. I then clear the image files from the inbox.
I can do all of this with built in FileMaker script steps except for deleting files from the in box, I use FileMaker to execute a system script for that. Since I have set this up for windows, my system constructs, exports and executes a batch file to accomplish that last step.