iPhone makes it impossible to add photos to the phone without iTunes. From the Windows File Explorer, you can only transfer photos from iPhone into the computer, but not the other way around. iTunes help to sync photos from computer to iPhone, but the syncing will wipe some of the photos that are not in the iTunes library. It's insane that we have to go through all these troubles just to move several photos to iPhone. So we have this tool called DoTrans to help us. It turns iPhone into a USB drive so that you can add as many photos as you like to iPhone from PC, iPad, Android phone. It can also transfer videos and more. www.fonepaw.com/tutorials/transfer-photos-to-iphone.html