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# volumeSupportsVolumeSizesKey

Key for determining whether the volume supports returning volume size information, returned as a Boolean `NSNumber` object (read-only). If `true`, volume size information is available as values of the [`volumeTotalCapacityKey`](/documentation/Foundation/URLResourceKey/volumeTotalCapacityKey) and[`volumeAvailableCapacityKey`](/documentation/Foundation/URLResourceKey/volumeAvailableCapacityKey) keys.

```
static let volumeSupportsVolumeSizesKey: URLResourceKey
```

---

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