Sometimes you just want to start over and format the SD Card on your myTouch 3G smart phone. The setting is difficult to find though. Here’s how to locate it.
1. Press Home.
2. Press Menu.
3. Tap Settings.
4. Scroll down and tap SD card & phone storage.
5. Tap Unmount SD card. This will enable the Format SD card option.
6. Tap Format SD card > Format SD card.