Move photos from my Mac to an album on my iPhone

I just got the ixpand and need help. I updated the firmware to work with iOS 9. I plugged the device into my Mac and placed 5 images in the photo folder.

What I want to do is move these images into an album on  my iPhone called grandkids. (All my photos are stored on the phone.)

I don’t know what to do. After plugging the ixpand into my phone I can select the photos. How do I mover them into the grandkid album? My only option seems to be to move them to camera roll.

A suggestion - move the pictures to the Camera Roll. Then, from your iPhone, mark the prefered pictures in the Camera Roll, and then move them to your prefered folder (grandkids).