IPhone back up question
When you back up your phone to iTunes in your computer, will it automatically save your photos too, or do you have to separately save your photos to Photos?
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Photos in the camera roll are part of the backup, but that does NOT mean that you can then delete them from the phone.
Each time you back up, the previous backup is overwritten. Backups are not intended for long term storage, they are for disaster recovery.
You should extract your photos to your computer the same as you would with any digital camera.