I read over my original question and realized it was not specific enough. What I would like to do is be able to set the local path in a function where the signature png files would be stored, and save that path with the complete signature file name to the external database.
Set local root path: /volume/pool/signatures
so if the signature file is named:
I’d like the path to be saved to the table:
And save the image to that path, not the database.