IPhone – Copy photos from places album to PC

There is no supported way to do that, for two reasons: the backup would grow huge, rapidly consuming iCloud space, and non-camera-roll photos are resized to display well on the iPhone while taking minimum space. As such, they're not the "original" photos any more. Backing them up would be a false sense of security.

The best solution is to back up the PC. The My Pictures folder will get backed up with the rest of your PC data, and you'll have copies of the original, non-resizd images should disaster strike.

You can't. iOS uses a simple photo database, very similar to iPhoto. Primary storage for all photo image data and metadata (time, place, exposure, etc) is the camera roll. This system lets you create the illusion of multiple albums, and storing photos in the albums.

But from a database perspective, your album is just a table with the image ID of every photo you place in it, creating a link back to the image data in the camera roll.

You can delete photos from albums, thereby removing them from the table.

When you delete a photo from the camera roll, you delete the photo from the system.