About saving content to the media card when you connect your device to a computer
The BlackBerry® Pushcast™ Software automatically stores content on a media card that you inserted into a BlackBerry device. If you connect your device to a computer and you set Auto Enable Mass Storage Mode to Yes or On, the media card is available as a content storage area on the computer and you can no longer access the content from your device. The BlackBerry Pushcast Software cannot read from or write to the media card. You must change this setting to No or Off so that BlackBerry Pushcast Software can send content to the media card when you connect your device to the computer.