Desperately need help!
So I have 426 postcards that have front and back images that are organized into folders on my computer by decades. I built a Story Map Journal, added all the photos to separate albums one decade at a time to Flickr, then on to the Journal. The problem is these historical postcards are not all mine and while I have permission to put them into the map and share publicly there, I didn't want them floating out there on Flickr because people were already liking/sharing my photos since they had to be public to connect to the Story Map. So I deleted the photos from Flickr and didn't know that was a problem (thought they were saved to my map!) and they just randomly disappeared a couple weeks after I deleted them from Flickr.
So how do I redo this map faster? I'm on a serious dissertation deadline!
Can I add multiple images at once somehow?
How do I make sure I can share the map (once it's done) publicly, but not beforehand?
Is the volume of these postcard images (852) a problem? I belong to my university's AGO and have extra credits, but honestly I don't know what that means here!
TIA for ANY help!