Although this feature is now integrated into the latest version of Windows Mobile (including  WM 6 and WM6.1), but there are some devices around, which still do not support this feature natively. For such devices, there is a great app called “Softick Card Export”, which emulates the storage card as “flash drive”. Here are some new devices that are supported:

• HTC Magician with Windows Mobile 6.1 is supported .
• Mio Leap G50 is supported.
• Treo 850e is beta supported.
• New features in the Today plugin.

[Softick Card Export official webpage]