This article covers 【限定】Seagate 3.5インチ 内蔵 HDD ハードディスク8TB 2年保証 5.

Overview

The Seagate BarraCuda ST8000DM004 is an 8TB 3.5-inch internal hard drive that balances capacity and affordability. With a 5,400 RPM spindle speed, 256MB cache, and a SATA 6Gb/s interface, it delivers maximum sustained transfer rates of 190MB/s. This drive is positioned as an entry-to-midrange storage solution for users who need vast amounts of space for media, games, and backups. This particular listing is an exclusive eco-package variant, which uses simplified packaging to reduce environmental impact. It comes as a Japanese official authorized product with a 2-year manufacturer warranty, offering peace of mind for buyers in Japan. The BarraCuda series has earned a reputation for reliability over two decades, making this model a trustworthy choice for secondary storage in desktop PCs. While SSDs dominate boot drives and active workloads, a high-capacity HDD like the ST8000DM004 remains the most cost-effective way to store large libraries of games, movies, or project files. It competes directly with Western Digital’s WD Blue 8TB and Toshiba’s N300 series in the same price and capacity tier.

Compatibility Guide

The ST8000DM004 uses a standard 3.5-inch form factor, which fits into almost any desktop PC case with a 3.5-inch drive bay. The SATA 6Gb/s interface is backward-compatible with SATA 3Gb/s and SATA 1.5Gb/s ports, so it can be used with older motherboards. For best performance, connect it to a SATA 6Gb/s port. Power is supplied through a standard SATA 15-pin connector. Most modern power supplies include enough SATA cables, but check your PSU’s cable count if you plan to add multiple drives. The drive does not include a SATA data cable — you'll need to purchase one separately. Since the drive exceeds 2TB capacity, your system must support GPT partition tables. UEFI-based motherboards and Windows 7 or later handle this without issue, but legacy BIOS systems may not recognize the full capacity. Additionally, if you intend to use this drive in an external USB enclosure, ensure the enclosure supports drives over 2TB.

Product Info

The Seagate BarraCuda ST8000DM004 has been available since early 2018 and remains a staple in the retail channel. Pricing hovers around ¥35,980 (approximately $250 USD) for the exclusive eco-pack. The standard retail version typically sells for a similar price. The drive carries a 2-year manufacturer warranty for Japanese authorized products. In the storage hierarchy, this HDD sits at the entry-to-midrange tier — it prioritizes capacity and quiet operation over raw speed. The 5,400 RPM spindle and 190MB/s sequential read/write are adequate for media streaming, file archives, and non-demanding workloads. It is not designed for OS boot drives or heavy random-access tasks.

Best Use Cases

Creative professionals needing bulk storage for raw footage and project archives. 8TB can store dozens of hours of 4K video or hundreds of thousands of high-res photos. Use SSDs for active editing and offload completed projects to this HDD for long-term retention. The 2-year warranty provides basic coverage, but consider adding a cloud or RAID backup for critical work. Gamers building a deep game library. Modern games can exceed 100GB each, so 8TB allows installation of ~80 AAA titles plus plenty of indie games. Load times will be significantly slower than an SSD, so keep your most-played games on an SSD and use this HDD for titles you play less frequently or for game recording storage. Home lab enthusiasts and file hoarders. The drive’s low power draw (idle ~3.5W) and quiet operation make it suitable for 24/7 operation in a home server or NAS. However, note that this is an SMR (Shingled Magnetic Recording) drive, which has slower random write performance. For RAID or heavy write scenarios, a CMR drive like Seagate IronWolf is recommended. Budget-conscious backup solution. Pair this HDD with a cheap USB 3.0 enclosure to create a reliable backup drive for your entire PC. At roughly $250 for 8TB, the cost per gigabyte is among the lowest available for internal storage. ## Alternatives
Western Digital WD Blue 8TB (WD80EAZZ) is the closest competitor. Both are 5,400 RPM, 256MB cache, SATA 6Gb/s drives. The WD Blue has a slightly lower maximum transfer rate (180MB/s vs 190MB/s). Pricing is nearly identical, and both offer a 2-year warranty. Some users report the WD Blue runs a bit quieter. If you prefer WD’s reputation for reliability, the WD Blue is a safe alternative, but the Seagate BarraCuda offers marginally better sequential performance. Seagate BarraCuda Pro 8TB (ST8000DM001) is a step up: it spins at 7,200 RPM and uses CMR technology, delivering around 220MB/s and better random write performance. However, it costs about 30% more and consumes more power. If your workload involves frequent large writes (video editing, server use), the Pro model is worth the premium. For casual bulk storage, the standard Bar