HK4R Specifications The HK4 Series are also Toshiba's first SATA SSDs with optional Trusted Computing Group (TCG) enterprise encryption support, and also feature Toshiba's proprietary QSBC® (Quadruple Swing-By Code) error correction technology. QSBC is a highly efficient error correction code (ECC) that help prevent data corruption caused by NAND flash memory wear, which improves reliability and extends drive life. According to Jeremy Werner, vice president of SSD and storage solutions marketing at Toshiba America Electronic Components, Inc., "The HK4 Series joins our family of SATA SSDs and is designed to meet the needs of our customers who are looking for a SATA SSD with low operating power, excellent quality of service, high capacity and with encryption. Knowing that security and encryption is a priority for our customers, we are thrilled to release a SATA SSD that meets those needs."