My iPhone is full. No more space. It’s full of photos and videos. I need a 128GB iPhone.

The Photo app on your iPhone doesn’t show you the file names of the photos. It’s hard to figure out if you’ve already imported those photos or nor. I don’t trust iPhoto - sure, it says it’s already imported them, but it’s hard to fund imported photos in the library and be sure. Searching for filenames is hard when the iPhone doesn’t show you file name anywhere. 

The easiest way to manage this is to plug you iPhone into your Mac and launch the long-forgotten Image Capture application. 

It gives you a nice long pretty list of your Photos and Videos with Filenames and associated metadata. You can delete items from your phone and easily import them elsewhere.