This read-create StorageType value records how the configuration row for this Pseudo Wire OCN/STM card entry is persisted, such as volatile or non-volatile storage, per the standard SNMP conceptual-row model. It matters to an administrator because it determines whether the Pseudo Wire OCN/STM card's row survives a device reboot or has to be recreated afterward. For example, a technician who provisions this Pseudo Wire OCN/STM card entry with non-volatile storage can expect the settings to still be there after the next power cycle, unlike a volatile entry that would need to be redone.