# OryHydraClient::VolumeUsageData ## Properties Name | Type | Description | Notes ------------ | ------------- | ------------- | ------------- **ref_count** | **Integer** | The number of containers referencing this volume. This field is set to `-1` if the reference-count is not available. | **size** | **Integer** | Amount of disk space used by the volume (in bytes). This information is only available for volumes created with the `\"local\"` volume driver. For volumes created with other volume drivers, this field is set to `-1` (\"not available\") | ## Code Sample ```ruby require 'OryHydraClient' instance = OryHydraClient::VolumeUsageData.new(ref_count: null, size: null) ```