Storage Full On Your iPad? There‘s A Trick!
It drove me nuts. Whenever I wanted to import new photos from my Sony A7 camera onto the iPad I got a warning that the storage was full. But it wasn't.
Finally, I found a simple solution. You might even call it a hack. Go into the Apple TV app and start downloading one or two movies.
You don't have to download the movie. You can immediately cancel the download again.
Et voila: Now you have enough storage to import all your photos onto the iPad. Your welcome!