I'm still waiting on my phone, but try this out:

Auto Mount Your SD Card - Android app on AppBrain

 

That app isn't necessary. You just plug in the phone to your desktop/laptop with the microUSB and it automatically mount itself as a separate drive. If it doesnt, go into the settings, and change the option.

 

make sure you check the notifications on the phone, it will ask you if you want to mount.

 

Just read the manual on how to use your phone.

 

1. Plug the phone into USB port.
2. Windows will notify you that your device has been found and is ready for use.
3. On the Droid pull down the Notifications bar and touch the "USB Connected" notification.
4. A pop up window will appear. Select "Mount".
5. Your Droid is now available in Windows File Explorer as a "Removable Drive"