returns the storage id for the storage unit . the storage id uniquely identifies the storage unit on the mtp device . concode_field_sep String mVolumeIdentifier concode_elem_sep long mMaxCapacity concode_elem_sep int mStorageId concode_elem_sep long mFreeSpace concode_elem_sep String mDescription concode_field_sep long getMaxCapacity concode_elem_sep long getFreeSpace concode_elem_sep String getVolumeIdentifier concode_elem_sep String getDescription
int function ( ) { return mStorageId ; }