So, I gave up on Apple a few years ago and have no ragerts. Apple has simply lost the thread of late and Microsoft is the real innovator these days. For the record, Windows 10 is the bomb and is far more functional than Mac OS X. Regardless of my enthusiasm, however, my wife Rima still insists on using her dumb ass iPhone 5s and it's admittedly sweet 8MP camera. She takes a lot of images, and that takes up a lot of room. She needed to archive the images she had taken and make room for a few thousand more.
But, ahem... iOS only lets you delete images one at a time, or a bunch, but you have to select them manually. One. at. a. time. How annoying, and terrible UI/UX design. Jesus, Apple, I thought you guys were supposed to be awesome at this.