+### storage_instance
+
+Called when a custom storage is used (e.g. webdav_storage)
+
+Hook data:
+- **name** (input): the name of the used storage backend
+- **data['storage']** (output): the storage instance to use (**must** implement `\Friendica\Model\Storage\IWritableStorage`)
+
+### storage_config
+
+Called when the admin of the node wants to configure a custom storage (e.g. webdav_storage)
+
+Hook data:
+- **name** (input): the name of the used storage backend
+- **data['storage_config']** (output): the storage configuration instance to use (**must** implement `\Friendica\Model\Storage\IStorageConfiguration`)
+