Your Apple iPhone is not only your news source, mobile calendar, game machine, messaging device, alarm clock and phone, but also your primary camera.
Follow these steps to back up your photos and preserve those precious moments.
MANUAL TRANSFER TO YOUR COMPUTER
If you regularly sync your iPhone with iTunes on your computer, then your photos are being backed up as well.
Otherwise, you can transfer all your photos on your iPhone manually to your computer, then copy them a DVD.
You could also copy them to a USB flash drive or external hard drive for safe storage.
Go to Applications and start Image Capture. Next, connect the iPhone to the Mac. The iPhone will show up in Devices in Image Capture.
Select All and import the pictures to an existing folder or to a new folder.
Connect the iPhone to the Windows machine. The iPhone will show up as a storage device. A prompt will offer you a few options. Choose "Open device to view files". You will find the photos under the DCIM folder. Drag this folder to your PC's desktop or to a new folder.