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Small green M.2 2242 circuit board with gold edge connector and black controller chip

Transcend

Transcend TS240GMTS420S 240GB M.2 SATA internal SSD

SKU CH-STX2-FVM5A MPN TS240GMTS420S

M.2 2242 SATA internal SSD with 240 GB capacity, up to 560 MB/s read and 500 MB/s write speeds

  • Total capacity120 GB
  • Sequential read speed420 Mbit/s
  • Sequential write speed500 MB per second
  • Interface typeSATA III
  • Form factorM.2 2280
  • Product typeInternal Solid State Drive (SSD)
  • M.2 2242 form factor fits ultra-compact devices
  • SATA III interface delivers up to 560 MB/s sequential read
  • 3D NAND with SLC caching enables 500 MB/s sequential write
  • LDPC coding and RAID engine protect data integrity
  • DevSleep mode extends battery life in notebooks

Transcend 240GB M.2 SATA SSD

This 240GB internal solid-state drive uses the M.2 2280 form factor and a SATA III 6Gb/s interface. It is built with 3D NAND flash and SLC caching technology to serve compact laptops and desktops needing a straightforward storage upgrade.

SATA III interface limits

The SATA III connection caps maximum sequential throughput at 6Gb/s, so real-world speeds cannot exceed this bus limit regardless of the drive's internal capability. Random 4KB performance reaches up to 65,000 read IOPS and 85,000 write IOPS within that constraint.

560 MB/s maximum sequential read

The drive's peak sequential read speed is rated at 560 MB/s, with sequential write up to 500 MB/s. This single figure determines whether the drive meets the throughput requirement for a given SATA-based system.

How it compares

Measured against everything we stock in Internal NVMe & SATA SSDs, at today’s prices. Recalculated every night.

Price $55.99
Cheaper than about 88% of the 1,994 comparable items (median $180.49).
Total capacity 120 GB
Lower than about 95% of the 1,368 comparable items (median 1 TB).
Price per TB $466.58 per TB
Pricier than about 85% of the 1,362 comparable items (median $165.50 per TB).

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Specifications

Product
Brand nameTranscend
Model nameTS120GMTS420S
Part numberTS120GMTS420S
Total capacity120 GB
Product typeInternal Solid State Drive (SSD)
Performance
Sequential read speed420 Mbit/s
Sequential write speed500 MB per second
Sustained random 4KB read420 Mbit/s
Random write (4K)420 Mbit/s
Storage
Cache memory120 unknown modifier
Connectivity
Connection protocolSATA
Ports & slots
Interface typeSATA III
ConnectionSATA
Size & build
Form factorM.2 2280
Product depth2.2 in x 0.39 in x 8.0 in

Questions about this item

Should I choose the 120GB or 240GB version of the Transcend MTS420S?

The 240GB model provides twice the storage of the 120GB version while keeping the same M.2 2280 form factor and SATA III interface.

What does the 560 MB/s sequential read figure mean when the drive is installed in my laptop?

It represents the peak throughput the controller can deliver over the SATA III link; real-world speeds will be lower and depend on the system workload and file sizes.

The drive uses a SATA III interface — what does that limit in practice?

The SATA III 6 Gb/s connection caps maximum sequential transfer at roughly 560 MB/s, so the drive cannot exceed that ceiling even if the flash memory is faster.

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