Microsoft Windows has supported MSC since Windows 2000. Most mainstream operating systems include support for USB mass storage devices support on older systems is usually available through patches. While MSC is the original abbreviation, UMS (Universal Mass Storage) has also come into common use. Digital audio and portable media playersĭevices supporting this standard are known as MSC (Mass Storage Class) devices.Adapters between standard flash memory cards and USB connections.External optical drives, including CD and DVD reader and writer drives.An action camera being accessed via mass storage device classĭevices connected to computers via this standard include: