Transcend 128GB MTS400S SATA III M.2 Internal SSD (Type 2242)

The Transcend MTS400S is a compact M.2 form-factor solid-state drive built around the space-saving Type 2242 footprint (22 mm wide, 42 mm long). This smaller-than-standard length makes it a practical choice for ultrabooks, mini-PCs, embedded systems, and any chassis where a full-length 2280 drive simply will not fit without a riser or bracket. Running on the widely supported SATA III interface, the MTS400S delivers sequential read speeds of up to 500 MB/s and sequential write speeds of up to 450 MB/s — a substantial step up from mechanical hard drives and older SATA SSDs operating at lower bandwidth. Everyday tasks such as booting your operating system, launching applications, and transferring large media files all benefit from this headroom. Inside, Transcend specifies Multi-Level Cell (MLC) NAND flash memory paired with a DDR3 DRAM cache. MLC stores two bits per cell, striking a balance between endurance and density that suits both primary storage and secondary cache roles. The board DDR3 DRAM cache accelerates random read/write operations and helps maintain consistent performance during sustained workloads by reducing direct access to the NAND cells. With 128 GB of usable capacity, the drive is suited as a primary OS and applications volume for lean software setups, or as a fast secondary drive alongside a larger bulk-storage device. Verified Specifications: • Model: MTS400S (TS128GMTS400S) • Capacity: 128 GB • Interface: SATA III (6 Gb/s) • Form Factor: M.2 Type 2242 • Sequential Read: up to 500 MB/s • Sequential Write: up to 450 MB/s • Flash Type: MLC NAND • Cache: DDR3 DRAM • Brand: Transcend Note: Endurance (TBW), MTBF, operating temperature, and warranty duration are not confirmed in available source data and have been omitted to avoid unverified claims