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Black rectangular 2.5 inch SATA SSD with silver label

SAMSUNG

SAMSUNG 870 EVO MZ-77E4T0B/AM 4TB 2.5" SATA internal SSD

SKU CH-JKTD-R79ZW MPN MZ-77E4T0B/AM

A 4 TB 2.5" SATA internal SSD with V-NAND memory, 560 MB/s read, 530 MB/s write and 2,400 TBW 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)
  • Sustains heavy workloads with up to 2400 TBW endurance
  • Sequential reads reach 560 MBps for fast file access
  • Sequential writes hit 530 MBps to keep projects moving
  • AES 256 hardware encryption protects data at rest
  • 5 million hour MTBF signals long-term reliability

Capacity and audience

This Samsung 870 EVO is a 4TB 2.5-inch internal SSD built for consumer PCs and notebooks. It uses V-NAND memory and a 4GB Low Power DDR4 cache to deliver sequential reads up to 560 MBps and writes up to 530 MBps. The drive is rated for 2400TB written and a 1,500,000-hour MTBF.

SATA interface limits

The drive connects over SATA III, which caps sequential throughput at the quoted 560/530 MBps regardless of workload. AES 256 encryption follows TCG/Opal v2.0 and MS eDrive IEEE1667 standards. Performance scales with the host controller but cannot exceed the SATA bus ceiling.

Compatibility checklist

Verify your system has a free 2.5-inch bay with 7.00mm height clearance and a SATA data plus power connection. Confirm the motherboard or RAID controller supports SATA III for full speed. Ensure the BIOS or OS can address a 4TB volume without legacy limits.

How it compares

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

Price $1,320.99
Pricier than about 90% 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 $330.25 per TB
Pricier than about 79% of the 1,362 comparable items (median $165.50 per TB).

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Specifications

Product
Brand nameSAMSUNG
Product line870 EVO Series
Model nameMZ-77E4T0B/AM
Part numberMZ-77E4T0B/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
Storage
NAND flash typeV-NAND
Cache memorySamsung 4 GB Low Power DDR4 SDRAM
Data encryptionClass 0 (AES 256) TCG/Opal v2.0, MS eDrive (IEEE1667)
Write endurance2400 TB
Connectivity
Connection protocolSATA
Ports & slots
Interface typeSATA III
Size & build
Form factor2.5 in (6.35 cm)
Overall height7 mm
Overall width70 mm
Product depth100 mm
Shipping weight0.09 kg
Package size142 × 98 × 19 mm
More details
Mean time between failures1,500,000 h

Questions about this item

Which capacity of the 870 EVO series should I choose for heavy workloads?

The 4TB model provides 2,400 TBW endurance and a 1,500,000-hour MTBF, making it suitable for sustained write-intensive tasks such as 8K video processing.

What do the 560 MBps read and 530 MBps write figures mean once the drive is installed?

Those are the maximum sequential speeds the SATA III interface allows; real-world throughput will sit at or just below those numbers during large file transfers.

How does the SATA III interface limit performance in practice?

The SATA III link caps sequential transfers at 560/530 MBps, so the drive cannot exceed those speeds regardless of the V-NAND or 4GB DDR4 cache capabilities.

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