All Zoot databases include a number of system folders which cannot be deleted. These system folders have a yellow icon with a blue square in it to distinguish them from all other folders. By name the system folders are New Columns, Storage Bin, New Arrivals, Queries, System and Default View.
The system folders provide a basic familiar structure for a database's Folder Tree and they also play a role in the day to day operation of your databases. You can think of the system folders as beacons placed to help you navigate the sometimes complex structure of a database's Folder Tree.