A good rule of thumb is to Always Save, Synchronize Often.
When using the BeatBuddy Manager (BBM) to manage your project, save it often so that your work is always stored on your computer.
If you intend to use the BeatBuddy (BB) right away, synchronize your project to your SD card (but if you’re using a Mac and synchronize does not work, then BBM > File > Export > Project to SD card). Otherwise wait until you are done using the BBM to sync to your card.