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The WD Red Plus 4TB (WD40EFZZ) is a 3.5-inch internal hard drive built for NAS boxes and RAID arrays. It spins at 5400 rpm with a 128MB cache on a SATA 6Gb/s interface, and WD rates it for continuous 24/7 operation in multi-bay enclosures. It uses conventional magnetic recording rather than shingled recording, so it rebuilds RAID arrays at normal speed. Against Seagate IronWolf and Toshiba N300 drives of the same size, it is the quiet, low-power pick rather than the fastest. It suits home and small-office NAS owners who want dependable bulk storage more than peak throughput.
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In stockSold by Newegg Inc.Returns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
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Lowest price we've seen: $194.99 on Nov 10 at Best Buy. Tracked across 5 stores since Nov 10.
Owners rate it highly, with 4.8 out of 5 from 12 ratings. Feedback centers on quiet running and steady behavior in NAS enclosures.
WD Red Plus internal HDDs are designed to handle workloads for power users and small to medium business NAS environments. WD Red Plus drives deliver the speed and capacity required to store, protect and share growing amounts of data in mid-sized RAID-optimized NAS systems with increased power efficiency.












