The WD Red 4TB 5400RPM internal hard drive (opens in new tab) has dropped to $89.99 on Amazon. That's a super low price and matches a deal we've only seen once before back in August. These drives normally sell for around $135 or more, but Amazon is currently matching a Black Friday sale on the WD website.
The 3TB version (opens in new tab) of the drive is also on sale. It's a little less space, but the price might be worth it if you plan to buy multiple drives to fill your NAS. Get it for just $75.99 when it's more likely to sell for somewhere between $90 and $110 on a normal day.
The WD Red hard drives are specifically designed for network-attached storage devices, which means they are great for building your own media server. Luckily, Black Friday is also a good time for NAS deals. Grab the Synology DS218+ DiskStation (opens in new tab) while it's on sale for $254.99 from a street price around $300. This is a two-bay system so you'll want two of the WD Red drives to fill it.
Thanks to the huge 4TB capacity, you'll be able to create your own media server with all the music, movies, and other data you could possibly want. Paired with one or two more in a network-attached storage device, you can create a system where each drive backs up the other so your media is never lost. Because NAS devices are designed to serve as backups, you'll probably want to get more than one drive, and that's why deals are the preferred way to buy them.
They've been tested to perform reliably in a 24/7 always-running environment like you would have with a NAS. They also have a heavy workload rate and can handle up to 180 TB a year. WD backs these hard drives with a three-year warranty.
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