Imagine a situation that you want to carry some important files for your business trip. You are already taking your 16GB or 32GB iPhone or iPod with you. Well, then you do don’t want to worry about an another hard disk for carrying your important files. You can use your iPhone as a hard disk to carry those files with you.
Think about another situation that you want to keep some secret files with you, keep it in your iPhone. You don’t want to put it in your computer, anybody can hack your computer files by online or offline.
Whatever the reasons, you have one simple solution. Use your iPhone as an external portable flash drive.
iExplorer is a wonderful free application, (Update:  iExplorer is not free anymore, alternatively you can find similar free apps iFunBox and Macgo iPhone Explorer to perform the same requirement) which help you to use your iPhone / iPad / iPod as an external hard disk. Once you install this application in your laptop, you can connect your iDevice into it and use as flash drive. You need Windows PC with Windows 7, Windows Vista or Windows XP, iTunes 9 or later and A USB Connector for the iPod device.
Also read: How to Record iPhone Screen and Voice on Windows
Once you connected your iPhone to PC, you can create folders in to iPhone drag and drop files into iPhone. Another feature is that you can dig into iOS folders, you can drag and drop files from your iPhone to your computer or vice versa. There is no need to install any application into your iDevice. You can see your iOS files, can see apps folders, and in media folder you will be able to see your recorded voice memos, pictures and videos.
If you’ve taken pictures with your iPhone’s camera and want to view them without using any of Apple’s software, iExplorer lets you preview and transfer all image files directly from the device. your photos, videos, apps files. Copy files to and from your iPhone, iPad or iTouch using a simple drag and drop interface.