Here is a step-by-step on making your microSD card read as a mass storage device. This Blackberry hack will allow you to transfer files to and fro without using the Blackberry Desktop Manager software.
Go to the Options icon on your Blackberry 8800 and select the Advanced Options
Select Media Card
Choose the following options.
Media Card Support: ON
Encryption Mode: NONE, although you can change
Mass Storage Mode Support: ON
Auto Enable Mass Storage Mode When Connected: YES
Safely Remove on Battery Door Removal: YES, this means you can swap microSD cards without shutting down the Blackberry.
Lastly, if â€œPromptâ€ is selected for â€œAuto Enable Mass Storage Mode When Connectedâ€ then you will get this screen when attempting to connect your Blackberry 8800 series to your computer. Just click â€œDonâ€™t ask this againâ€ and it wont appear again.