As we know, when you sync photos to your iPhone with iTunes, it maybe erase the photos on your iPhone. To avoid this things, you can try TunesGo. It will never delete anything when transferring photos to iPhone/iPad/iPod, also it's faster and easier than iTunes syncing.
Transfer iPhone/iPod/iPad to iTunes, PC & Mac
> Transfer music and video to iTunes & Computer, and vice verse
> Copy photos, albums between iPhone, iPad, iPod and computer
> Fully manage your iPhone contacts & SMS without iTunes
> Newly support iOS 7, iPhone 5S & iPhone 5C and iPad Air