You need to setup the plugin database using the official migrations plugin for CakePHP.
cake migrations migrate -p Burzum/FileStorage
If you're coming from the CakePHP 2.0 version of the plugin, the support for the CakeDC Migrations plugin has been dropped in favor of the official migrations plugin.
If you want to use integers instead of UUIDs put this into your bootstrap.php
before you're running the migrations:
Configure::write('FileStorage.schema.useIntegers', true);
This config option is not available for the regular CakePHP schema that comes with the plugin. It seems to be impossible to override the type on the fly. If you can figure out how to do it a pull request is welcome.