If you are an Ubuntu user, your iPhone (or iPod Touch) can be used as an emergency external drive. You can also easily access and download images.This can be accomplished without having to jailbreak your phone (or media player).
1. Open a terminal window.
2. Execute the following command:
gksu gedit /etc/apt/sources.list
3. Add the following to the end of the APT sources file:
deb http://ppa.launchpad.net/jonabeck/ppa/ubuntu jaunty main
deb-src http://ppa.launchpad.net/jonabeck/ppa/ubuntu jaunty main
4. Save and close the sources file.
5. Go back to the terminal window.
6. Execute the following:
sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com F0876AC9
sudo apt-get update
sudo apt-get install ifuse
7. Connect the iPhone or iPod Touch to your Ubuntu computer using the USB cable.
8. Open Nautilus. The iPhone (or iPod Touch) will appear in the side pane as a mounted drive.
To use as an external drive, create a new folder and name it something that you can easily recognize. Use this directory to store any files that you place on the device.