What's the file "Unsaved Preferences"?

[alsa]

There are two files in my backup on the memory stick - Saved Preferences and Unsaved Preferences. What is the differences? I know saved preferences saves the preferences for all your applications. Correct?

[Gabo]

The different is that the saved preference is backup to pc when you perform a hotsync, this is used for the apps to store important information about itself. The unsaved preference is not transfer to the pc so is used for the apps for store temp data.