Once I figured it out, I was impressed at the dead-simple (if nonobvious) way the iPhone manages pictures: you use iTunes to transfer you pictures to a computer, organize them on the computer, and use iTunes to copy the now-organized pictures back to the phone, ignoring iTunes when it threatens to delete all your pictures. (It deletes pictures in folders, but not the ones in your camera folder.)

My Motorola Droid Maxx's gallery has gotten unwieldy. I know I can arrange pictures into folders on the phone, or copy them back and forth with various utilities, but I imagine simple tools exist to make this painless.

Can anyone suggest one?

Thanks.