# WD201KFGX — High-capacity NAS hard drive for 24-bay systems > WD201KFGX [WD Red Pro（20TB 3.5インチ SATA 6G 7200rpm 512MB）] summary. The Western Digital WD Red Pro WD201KFGX is a 20TB 3.5-inch SATA 6Gb/s HDD with 7200rpm and 512MB cache. Designed for up to 24-bay NAS, it offers a 300TB Tags: hdd, western-digital, wd-red-pro, 20tb, nas, sata Source: https://www.amazon.co.jp/dp/B09TBF6GHJ Article page: https://web-autoai.com/articles/wd201kfgx-wd-red-pro20tb-35-sata-6g-7200rpm-512mb?lang=en Prices and ratings change over time — check the article page for the current values. --- This article covers WD201KFGX [WD Red Pro（20TB 3.5インチ SATA 6G 7200rpm 512MB）]. ## Overview The WD Red Pro series is Western Digital's premium line for NAS deployments, and the WD201KFGX is the 20TB model in this family. It's a 3.5-inch SATA 6Gb/s drive with a 7200rpm spindle speed and a 512MB cache, designed to handle up to 24-bay NAS systems. With an annual workload rating of 300TB, it targets medium and large business storage environments where data integrity and reliability are paramount. Featuring NASware 3.0 and 3D Active Balance Plus, this drive offers advanced error recovery control and vibration damping, which are essential for multi-drive RAID arrays running 24/7. It also goes through extended drive testing to ensure consistent performance over long operational periods. Whether you're a creative professional archiving massive video libraries or an IT admin managing a corporate NAS, this drive balances capacity with endurance. In the broader market, the WD Red Pro sits in the mid-to-high tier of NAS HDDs. The 20TB capacity pushes it into a segment where most competitors are enterprise-grade with higher price tags, making it a cost-effective option for large-scale storage without stepping fully into enterprise gear. ## Compatibility Guide As a standard 3.5-inch SATA drive, compatibility is broad across desktop PCs and most NAS chassis that have a spare 3.5-inch bay and SATA port. However, compact systems that only accept 2.5-inch drives, such as many mini PCs and laptops, won't physically accommodate it, so always verify your chassis and enclosure specifications first. Power draw is modest—roughly 5–7W during operation—but if you plan to run several drives in a RAID array, you need enough headroom in your PSU. For a high drive count, a high-efficiency power supply and proper cooling are strongly advised. Each drive generates heat, so ensure your case has adequate airflow. Given the SATA interface, you won't get NVMe-level transfer speeds. Sequential throughput sits around 250MB/s, which is perfectly fine for file serving, backups, and media storage. It's not intended as a boot drive or for high-random-I/O workloads—those should stay on SSDs. ## Product Info The WD201KFGX was launched around 2022 and carries a 5-year limited warranty. This drive includes NASware 3.0 for optimized RAID operation and 3D Active Balance Plus for vibration reduction. These technologies make it a solid choice for nearline storage in NAS environments. While it doesn't hit enterprise-grade endurance ratings, it's more than capable for SMB deployments. It sits firmly in the high-capacity, mid-premium tier of NAS drives. ## Best Use Cases * IT administrators managing 24-bay NAS systems in SMBs: This drive is engineered for high-write environments with a 300TB/year workload rating, making it suitable for continuous operation. The 5-year warranty adds peace of mind for long-term deployments. * Creative professionals archiving 4K or 8K video: With 20TB of space, you can store hundreds of hours of footage. Just remember that active editing workloads belong on SSDs—use this drive as a cold archive or nearline storage solution. * Home lab enthusiasts building a high-capacity NAS: If you have a 4-bay or larger NAS that supports 20TB drives, these can create a massive storage pool. But check your NAS's compatibility list first, and budget for the initial investment plus any additional cooling. ## Things to Consider First, as an HDD, it is dramatically slower than any SSD, especially in random access. Don't install your OS or frequently used applications on this drive; it's meant for sequential workloads like media storage and backups. Second, the price per terabyte isn't always the most economical. For the same cost, you might get more usable capacity with two 8TB or 10TB drives, depending on your NAS's bay count and RAID requirements. Compare total cost before committing to a single 20TB unit. Third, not all NAS units support drives of this size. Older models or entry-level NAS boxes may have a 20TB limit, and some RAID controllers may not handle the capacity correctly. Always check the official compatibility list from your NAS vendor and confirm the firmware is up to date. ## FAQ Q: Can I use this drive in a regular desktop PC? A: Yes, it's a standard 3.5-inch SATA drive that works in most desktop towers. Just ensure you have a free 3.5-inch bay and a SATA power connector on your PSU. Q: What's the difference between WD Red Pro and WD Red Plus? A: WD Red Plus is intended for smaller NAS setups and lighter workloads, while WD Red Pro offers higher endurance, larger capacities, and is validated for up to 24-bay systems. If you're building a multi-drive RAID, the Pro line is generally a better fit. Q: Should I use RAID with a 20TB drive? A: Yes, given the ### Product Disclosure (Amazon) - Manufacturer: ウエスタンデジタル(Western Digital) - Seller: レスターエンベデッドソリューションズ - Fulfilled by: レスターエンベデッドソリューションズ - ASIN: B09TBF6GHJ - Note: This article covers a manufacturer-made product based on Amazon listing details.