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Rectangular 2.5 inch SATA SSD with silver metal casing and Samsung label

SAMSUNG

SAMSUNG 870 QVO 4TB 2.5" SATA III internal SSD MZ-77Q4T0B/AM

SKU CH-61R6-Y9161 MPN MZ-77Q4T0B/AM

A 4TB 2.5" SATA III internal SSD with V-NAND, 560/530 MB/s sequential speeds, AES 256-bit encryption and 1440TB endurance

  • Total capacity4 TB
  • Sequential read speedUp to 560 MB/s
  • Sequential write speedUp to 530 MB/s
  • Interface typeSATA III
  • Form factor2.5 in (6.35 cm)
  • Product typeInternal Solid State Drive (SSD)

Capacity 4TB

  • 4TB capacity stores large media libraries and game collections
  • Sequential reads up to 560 MBps and writes up to 530 MBps accelerate file transfers
  • AES 256-bit encryption with TCG/Opal 2.0 protects data at rest
  • 1440 TBW endurance rating supports heavy daily workloads
  • Samsung Magician software monitors health and enables firmware updates

4TB SATA III QLC Drive

The Samsung 870 QVO MZ-77Q4T0B/AM is a 4TB internal solid state drive built for consumer desktops and laptops. It uses V-NAND memory and a SATA III interface to deliver high-capacity storage in the standard 2.5 inch form factor. The drive includes a 4GB Low Power DDR4 cache and supports AES 256-bit encryption with TCG Opal 2.0 compliance.

Simple 2.5 Inch SATA Upgrade

Installation follows the standard 2.5 inch SATA process: connect the drive to a SATA data cable and power connector inside a compatible bay or caddy. No additional drivers are required for the SATA interface to be recognised by the operating system. The Samsung Magician software assists with initial setup, firmware updates and health monitoring. The main issue arises when a system lacks a free SATA port or a 2.5 inch mounting location, which prevents physical installation.

Sustained Write Behaviour With 1440 TBW

The MKX controller and refined ECC algorithm manage sustained workloads to maintain stable performance beyond the SLC cache region. Sequential write speeds reach up to 530 MBps while the 1440 TBW endurance rating and 1.5 million hour MTBF reflect long-term reliability. TRIM support and automatic garbage collection help preserve consistent write latency during extended operations. Device sleep mode reduces power draw when the drive is idle.

How it compares

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

Price $285.99
Pricier than about 67% of the 1,994 comparable items (median $180.49).
Total capacity 4 TB
Higher than about 90% of the 1,368 comparable items (median 1 TB).
Sequential read speed Up to 560 MB/s
Lower than about 60% of the 1,180 comparable items (median 2,400 MB/s).
Price per TB $71.50 per TB
Cheaper than about 93% of the 1,362 comparable items (median $165.50 per TB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameSAMSUNG
Product line870 QVO Series
Model nameMZ-77Q4T0B/AM
Total capacity4 TB
Product typeInternal Solid State Drive (SSD)
Intended useConsumer
Performance
Sequential read speedUp to 560 MB/s
Sequential write speedUp to 530 MB/s
Random read (4K)Random (QD1) [IOPS]: 11,000
Random (QD32) [IOPS]: 98,000
Random write (4K)Random (QD1) [IOPS]: 35,000
Random (QD32) [IOPS]: 88,000
Storage
NAND flash typeV-NAND
Controller chipMKX
Cache memorySamsung 4 GB Low Power DDR4 SDRAM
Data encryptionAES 256-bit Full Disk Encryption, TCG/Opal V2.0, Encrypted Drive (IEEE1667)
Write endurance1440 TB
Connectivity
Connection protocolSATA
Ports & slots
Interface typeSATA III
Power
Idle power draw35 mW
Active power draw3.2 W Average
5.5 W Max
Size & build
Form factor2.5 in (6.35 cm)
Overall height7 mm
Overall width70 mm
Product depth100 mm
Product weight86.18g
Shipping weight0.10 kg
Package size145 × 99 × 20 mm
Environment & compliance
Operating temperature range0 °C to 70 °C
Max shock tolerance1,500G & 0.5 ms (Half sine)
More details
Mean time between failures1,500,000 h

Other versions of this model

3 more in the same range

Questions about this item

How do I confirm the 870 QVO 4TB is performing at its rated 560 MB/s read and 530 MB/s write after installation?

Run a SATA benchmark tool such as CrystalDiskMark or Samsung Magician and verify sequential results approach 560 MB/s read and 530 MB/s write; S.M.A.R.T. data will also show the drive healthy with 0 reallocated sectors.

What comes inside the MZ-77Q4T0B/AM retail box and what must I supply myself?

The box contains the 2.5 inch 4TB SATA SSD only; you must provide a SATA data cable, a SATA power connection from your PSU, and a 2.5 inch drive bay or adapter bracket for desktop mounting.

Which 870 QVO capacity should I choose if I want the 1,440 TBW endurance rating and 4GB DDR4 cache?

The 4TB model matches those specifications; the 1TB and 2TB versions have lower TBW ratings while the 8TB model offers 2,880 TBW.

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