im going to be using this on a site where users will be submitting stories which comes in episodes.
so most of the times they need to upload the same featured image.
is there anyway users can select an image that they uploaded previosuly?
also users should not see images uploaded by other users.
Sorry, this feature can't be done with WPUF right now. Users wouldn't be able to see any galleries like default WordPress media library. But yes, a custom implementation can be made, but that requires some coding skills and out of normal support range.