// Given - quota restricts caller available units
            long totalClusters = 26214400L; // 100GB / 4KB
            long callerAvailable = 2621440L; // 10GB / 4KB (quota limit)
            long actualFree = 13107200L; // 50GB / 4KB (actual free)

            ByteBuffer buffer = ByteBuffer.allocate(32);
            buffer.order(ByteOrder.LITTLE_ENDIAN);