This article covers Samsung 850 EVO 1TB 2.5-Inch SATA III Internal SSD.

The Samsung 850 EVO 1TB (model MZ-75E1T0B/AM) is a 2.5-inch SATA III internal SSD that has been a staple in the storage market since its release in 2015.

It uses Samsung's 32-layer 3D V-NAND TLC memory, delivering sequential read speeds up to 540 MB/s and writes up to 520 MB/s. The 1TB capacity and slim 7mm profile make it an excellent drop-in upgrade for laptops and desktops alike.

Positioned as a mid-range SATA SSD, the 850 EVO offers a strong balance of performance, reliability, and value. While it can't match the blistering speeds of modern NVMe drives, it remains a fantastic choice for breathing new life into older systems or adding dependable bulk storage.

Its longevity and proven track record have earned it a loyal following. Form Factor: 2.5-inch, 7mm thickness.

Fits standard 2.5-inch bays in laptops and desktops.

For 3.5-inch desktop bays, a mounting bracket is required (often included with cases).

Interface: SATA III (6 Gbps). Backward compatible with SATA II (3 Gbps) and SATA I (1.5 Gbps), though speeds will be capped at the lower interface limit.

Operating Systems: Works with Windows 10/8/7/Vista SP1+, Windows Server 2008, and Linux. Also compatible with macOS (requires reformatting).

Capacity Variants: Also available in 120GB, 250GB, 500GB, 2TB, and 4TB (the 4TB version is the 850 EVO in 2TB? Actually 4TB is 860 EVO; we'll stick to 1TB).

Released in December 2014, the Samsung 850 EVO 1TB became a landmark product for SSD adoption. It features Samsung's second-generation 32-layer 3D V-NAND TLC, a Samsung MGX controller, and 1GB of LPDDR3 DRAM as cache.

The drive comes with a 5-year limited warranty (or up to 150 TBW). Market positioning is mid-range; it's not the fastest SSD available but offers outstanding reliability for everyday use.

Key performance specs: Sequential read 540 MB/s, sequential write 520 MB/s, random read 100,000 IOPS, random write 90,000 IOPS. TBW rating is 150 TB, which translates to about 0.4 years under continuous 1TB/day writes — but typical users will enjoy many years of service with moderate write loads.

Reviving Old Laptops and Desktops: Upgrading from an HDD to the 850 EVO dramatically reduces boot times and application load times. It's the single most impactful upgrade for systems from 2010-2017.

Reliable Secondary Storage: For storing games, media, and documents in a desktop that already has a faster NVMe boot drive. The 1TB capacity offers ample space without breaking the bank.

  • Budget-Conscious Builders: If you're building a very low-cost system and can't justify the premium for NVMe, this SATA SSD provides excellent everyday performance for web browsing, office work, and light gaming. Significantly Slower Than NVMe: With peak sequential speeds around 540 MB/s, the 850 EVO is far behind even entry-level PCIe 3.0 NVMe drives (around 3,500 MB/s).

Large file transfers will be noticeably slower. TBW Limitations: The 150 TBW rating is modest by modern standards.

For heavy write workloads (e.g., 4K video recording, server caching), consider a drive with higher endurance like the 860 EVO or a pro model.

Aging Product: Being nearly a decade old, finding brand-new units can be challenging. Many listings on and other retailers may be third-party or refurbished.

Verify the seller's reputation before purchasing. No M.2 Variant: This is a 2.5-inch SATA drive only.

If your system supports M.2 SATA, the 850 EVO M.2 version exists but is even rarer.

For modern builds, a 2.5-inch SSD may require extra cabling.

Q: Is the Samsung 850 EVO 1TB compatible with a PlayStation 4 Pro? A: Yes, the PS4 Pro accepts 2.5-inch SATA drives up to 9.5mm thick, and this 7mm drive fits perfectly.

It will improve load times, though not as much as an SSD on PS5. Q: Can I use this SSD with a macOS system?

A: Absolutely. The drive is detected by macOS and works after formatting to APFS or Mac OS Extended.

Note that TRIM is supported natively since OS X Yosemite. Q: How does the 850 EVO compare to the newer 870 EVO?

A: The 870 EVO uses 128-layer V-NAND, offers higher sustained write speeds, and has a TBW of 600TB for the 1TB model — four times the endurance. The 850 EVO is still a fine choice if found at a significantly lower price.

Product Disclosure (Amazon)

  • Manufacturer: サムスン(SAMSUNG)
  • Seller: PENNY LANE
  • Fulfilled by: PENNY LANE
  • ASIN: B00OBRFFAS
  • Note: This article covers a manufacturer-made product based on Amazon listing details.