+To use multiple storage classes, update the @StorageClasses@ and @Volumes@ sections of your configuration file.
+* Every storage class you use (including "default") must be defined in the @StorageClasses@ section.
+* The @StorageClasses@ section must use @Default: true@ to indicate at least one default storage class. When a client/user does not specify storage classes when creating a new collection, the default storage classes are used implicitly.
+* If some storage classes are faster or cheaper to access than others, assign a higher @Priority@ to the faster ones. When reading data, volumes with high priority storage classes are searched first.