DigiDNA.DiskAid - The application is developed by DigiDNA allows both Windows and Mac platforms using your iPhone or iPod Touch as you use an external drive. CRD has given us the opportunity to download free DigiDNA DiskAid. The program allows you to transfer folders and files between your computer, iPhone or iPod Touch, so say you get a great file manager. There is also an application FileAid using it along with this program, you will not only copy files and folders on your device, but also be able to immediately run them.
DiskAid is a tool for PC and Mac which enables the use of iPhone, iPad or iPod Touch as an external mass storage device. DiskAid gives access to the device's file system, transfers text messages (SMS) to computer, allows to copy, edit or rename files and folders on the iPhone, iPad or iPod Touch directly from the desktop. Using a USB connection, it is the safest and most reliable way to access device's files and folders. Used with FileApp or FileApp Pro transfered files and documents can easily being accessed on the device.

Features DigiDNA

You can transfer files via USB
Compatible with both Windows and Mac
Copy files and folders between your iPhone and iPod and your computer
Good file manager

• USB file transfer
• Copy Files & Folders between your iPhone, iPad or iPod Touch and your Computer
• Transfer Text Messages (SMS) from iPhone to Computer
• View files on iPhone, iPod Touch and iPad with FileApp & FileApp Pro
• Automatic applications and folder discovery
• File Sharing support with all compatible applications on iPhone, iPod Touch and iPad
• PC Windows (XP, Vista, 7) & Mac OS X (Leopard, Snow Leopard) compatibility
• Supports iPhone V1, 3G, 3G S and 4!
• Supports iPod Touch V1, V2 and V3!
• Supports iPad!
• Auto detection feature, just plugin it in!
• Files and Folders Browser
• Drag & Drop files and folders
• Double click on files for quick view (launches appropriate application)
• Device's free memory displayed
• Create shortcut to any file or folder
• Feature rich file organization including internal move, folder creation, renaming ... etc.
• File & Folder information window
• Access any application supporting File Sharing
• No jailbreak needed (except for Root folder access)
• Supports iTunes 10
• Supported iPhone OS versions: 3.0 to 3.2, iOS 4.x
• New: iOS 4 compatible
• What's new in the current version: see the change log for Windows PC or Mac OS X

Release history
http://www.digidna.net/news/diskaid-4-5-includes-iphone-text-messages-sms-transfer-fileapp-seasonal-sale