The WD Black SN770 2TB wins for most buyers with 7,250 MB/s Gen4 speeds at $300. The Barracuda suits bulk storage on a budget; the 870 EVO serves pros needing 4TB NVMe capacity.
The WD Black SN770 2TB is the clear winner for most users in 2026, delivering blazing NVMe speeds at a competitive price point — but the right choice ultimately depends on your budget, capacity needs, and use case. Whether you're a gamer, content creator, or simply need bulk storage on a budget, these three drives serve very different purposes.
This comparison pits a high-speed PCIe Gen4 NVMe SSD against a budget-friendly mechanical hard drive and a premium high-capacity SSD, covering everything from raw benchmark performance to real-world value. Here's exactly how they stack up.
WD Black SN770 2TB arrives as an M.2 2280 form factor NVMe drive, slotting directly into your motherboard's M.2 slot. It's compact, generates minimal heat compared to older Gen4 drives, and requires no additional cables or power connectors. The WD_BLACK branding targets enthusiast gamers and creators who want performance without the extreme cost of flagship drives.
Seagate Barracuda 4TB HDD takes a completely different approach with its 2.5-inch mechanical form factor. At this capacity in a portable 2.5" chassis, it's designed primarily for external enclosure use or secondary storage in desktops and select laptops. The Serial ATA interface is decades-old technology, but it remains functional for archival and backup roles where speed is secondary to cost-per-gigabyte.
Samsung 870 EVO 4TB — it's worth noting upfront that the product listing contains conflicting specifications, referencing both Samsung 870 EVO branding and WD_BLACK specifications. Based on the listed specs (PCIe NVMe, 7,300 MB/s reads, 2.5-inch form factor), this appears to be a high-capacity NVMe drive regardless of branding inconsistency. At $600, it occupies the premium tier and targets professionals who need both speed and massive capacity in a single drive.
This is where the three drives diverge dramatically.
WD Black SN770 2TB posts 7,250 MB/s sequential read and 6,900 MB/s sequential write speeds over PCIe Gen4 — representing a 35% improvement over previous-generation PCIe Gen3 drives. In real-world gaming tests, this translates to DirectStorage load times under 1 second for supported titles, and video editing workflows that handle 4K RAW footage without bottlenecking. For 2TB of NVMe storage at $300, the price-per-gigabyte sits at $0.15/GB, which is highly competitive in the Gen4 segment.
Seagate Barracuda 4TB HDD maxes out at 140 MB/s sequential transfer speeds — roughly 50x slower than the SN770. In practical terms, a game that loads in 2 seconds from an NVMe drive will take 60-90 seconds from this HDD. However, for storing large media archives, backup data, or infrequently accessed files, 140 MB/s is entirely adequate. At $150 for 4TB, the $0.0375/GB cost is the cheapest storage per gigabyte in this comparison by a wide margin.
Samsung 870 EVO 4TB (as listed) claims 7,300 MB/s read speeds, marginally edging the SN770 in peak sequential reads. The 4TB capacity at NVMe speeds makes it a powerhouse for professional workstations handling large video production files, databases, or expansive game libraries. However, the $600 price tag puts it at $0.15/GB — the same per-GB cost as the SN770 despite the premium absolute price.
Value analysis depends entirely on what you need storage for:
It's also worth flagging that both the SN770 and 870 EVO listings contain naming and branding inconsistencies that buyers should verify before purchasing. Confirm exact model numbers directly with retailers to ensure you receive the specified hardware.
Choose the WD Black SN770 2TB ($300) if you want the best all-around storage upgrade in 2026. Its PCIe Gen4 speeds, broad compatibility, and competitive pricing make it the top pick for gamers, streamers, and creative professionals who need a fast primary drive.
Choose the Seagate Barracuda 4TB ($150) if you need maximum storage capacity on a tight budget, or a secondary drive for bulk media and backups. Don't use it as your primary OS or game drive — the mechanical speed penalty is too significant.
Choose the Samsung 870 EVO 4TB ($600) if you're a professional content creator or power user who genuinely needs 4TB of NVMe-class storage in a single drive and can justify the premium. For most consumers, the SN770 paired with the Barracuda delivers better total value.
Yes. The WD Black SN770 2TB delivers 7,250 MB/s read speeds over PCIe Gen4 at $300 ($0.15/GB), making it one of the best value-to-performance NVMe drives available. It's 35% faster than Gen3 alternatives and compatible with most modern motherboards.
For primary storage or gaming, no — mechanical HDDs like the Seagate Barracuda are 50x slower than NVMe SSDs. However, for bulk archival storage, backups, or media libraries where cost-per-GB matters most, the Barracuda 4TB at $0.0375/GB remains a practical secondary storage option.
NVMe drives like the WD Black SN770 achieve 7,000+ MB/s sequential reads via PCIe Gen4. Traditional SATA SSDs (like the Samsung 870 EVO in its standard form) are capped at approximately 550 MB/s — making NVMe roughly 13x faster for large sequential transfers.
Technically yes, but it's not recommended. At 140 MB/s, game load times will be significantly longer compared to any SSD. Modern open-world games with large asset streaming (like Cyberpunk 2077 or Starfield) perform noticeably better on NVMe storage.
For video editing, the Samsung 870 EVO 4TB (as listed) offers the best combination of NVMe speeds and high capacity for large project files. If budget is a concern, the WD Black SN770 2TB handles 4K RAW workflows effectively and costs half as much, though you'll need additional storage for large archives.
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