---
title: kUSBMassStorageRBCSubClass
framework: IOKit
role: symbol
role_heading: Enumeration Case
platforms: [Mac Catalyst 18.4+, macOS 10.2+]
path: iokit/1424847-interface_subclass/kusbmassstoragerbcsubclass
---

# kUSBMassStorageRBCSubClass

## Declaration

```occ
kUSBMassStorageRBCSubClass = 0x01
```