The Image Hopper field (not the Post Image field) can be combined with Gravity Forms Dropbox add-on to automatically off-load images to your Dropbox account when a new form submission is completed. When configuring the Dropbox feed either choose the All File Upload Fields option, or specifically select an Image Hopper field to offload uploaded images.
Gravity Forms includes a number of useful filters to customize this configuration to your liking, including:
- gform_dropbox_folder_path – Override the Dropbox destination folder
- gform_dropbox_file_name – Override the filename before the image(s) are uploaded to Dropbox
Note: the Dropbox add-on will only off-load images during form submission. When you edit an entry, newly uploaded (or edited) images will not be uploaded. While there are plugins available to trigger feeds when editing entries, Dropbox is currently incompatible with them as it invalidates the links to existing offloaded images when the feed is rerun.