If you have a Mac
You can import pictures from your iOS device using iPhoto:
1. Connect the device to your computer. iPhoto should automatically launch into its import window with your device's images and videos listed.
Note: If iPhoto does not automatically open, you may wish to enable the behavior.
2. Click Import All. If you want only some of your images imported, select the images and videos you would like to import into iPhoto, then click the Import Selected button.
When the photos finish importing, you will be presented with a dialog asking whether you'd like to delete the original photos from your Camera Roll. Click Delete Photos.
If you have a Windows Vista or Windows 7 PC
To import photos or video from your device to Windows:
1. Connect your iOS device to the computer. If the AutoPlay window appears, click "Import Pictures and Videos using Windows", then skip to step 4. If the "Import Pictures and Video" dialog appears, skip to step 4.
Note: If the AutoPlay dialog box does not automatically open, you may need to enable the behavior.
2. Choose Start > Computer.
3. Right-click the logo for your device and click Import pictures and videos.
4. Click the Import Settings link.
5. In the resulting window, you can change the folder to which your Camera Roll's photos will be imported by clicking the Browse button next to the "Import to" field. By default, these will be imported to the My Pictures folder.
6.Enable the option, "Always erase from device after copying".
Note: Deleting photos after importing helps to reduce Camera Roll size, and it improves backup and restore times. You may choose Keep Photos if you wish to import the photos to additional computers. If you do not want Windows to delete pictures from your camera on subsequent imports, remember to come back here and disable this option when you're finished.
7. After setting your import options, click OK to dismiss the window.
8. Choose a tag if desired and click Import. This screen appears only while the import process is active:
9. Once the import is complete, Windows Photo Gallery will launch with your photos and videos highlighted under the "Recently Imported" section:
If you find that not all your photos were imported from your device's Camera Roll after performing the above steps, you can either copy the photos to your computer using Windows Explorer, or you can use additional software such as Windows Live Photo Gallery or Adobe Photoshop Elements 3.0 or later to import all pictures.
To copy the photos to your computer using Windows Explorer:
Connect the iOS device to the computer.
Choose Start > Computer.
Double-click the logo for the device to browse its camera folders.
Navigate to [iOS device]\Internal Storage\DCIM\100APPLE.
Manually copy the content in this folder to your computer, wherever you would like to store it.
Disconnect your device. Open the Camera Roll and manually delete all the pictures from the iPhone Camera Roll that you just imported.
To copy the photos to your computer using Windows Live Photo Gallery or Adobe Photoshop Elements 3.0 or later, refer to the documentation of the application you wish to use.
After your photos have been imported from your Camera Roll or Saved Photos, you can use iTunes to sync them back to your device.
You can import only photo and video content taken with the built-in camera or captured on the device. You cannot import photo or video content synced from iTunes.
Windows XP cannot import video files larger than 500 MB using Camera and Scanner Wizard. You can transfer these files directly from your device by selecting them in My Computer and dragging or copying the movie files to your computer's hard drive.