In ConfigPortal, storage types can now be assigned to storages. As shown in the image below, by assigning the type archive, a storage can be used as archive storage in VidiCore.

Selecting the option from a drop-down, a type can be assigned to a storage. If you select the archive type, a text field will appear where JavaScript code can be added for handling archive operations such as those documented in VidiCore's documentation:
Please note that once a storage is saved, you are not able to change its type. If you want to use it with another type you will have to delete the storage in ConfigPortal and recreate it with desired type.