We're using Gravity Forms for users to upload blog posts with attached images to our site (which we can then moderate & publish). Some of these photos are quite big, and I've noticed that Gravity Forms will store the photos in a folder such as wp-content/uploads/gravity_forms/1/2010/08 but a copy is also made in the default Wordpress upload folder - e.g. wp-content/2010/08 - and it is this copy that is shown in the blog posts.
So my question is, is it safe to delete the files in the wp-content/uploads/gravity_forms/... given that they have now been copied over, or could this cause problems to the plugin or the frontend user? I ask as we have a lot of photos uploaded to our site, and keep on running out of diskspace. Thanks!