Terabytes written is an estimate, provided by the manufacturer, of how much data can be written to a drive before some cells begin to fail and get taken out of service. (The Lexar NM610 and NM620 are among the few TLC-based drives we've seen with lower durability ratings-250TBW for the 512GB version, and 500TBW for 1TB.) The WD Blue's ratings are closer to those we expect from drives based on less-durable QLC memory. The SN570's durability ratings, as measured in terabytes written (TBW), match those of the SN550 but are considerably lower than what we expect from a TLC-based drive. The two we cover most frequently are WD Black-high-performance drives aimed at professionals and gamers, such as the WD Black D50 Game Dock NVMe SSD and WD Black P50 Game Drive SSD-and WD Blue, a line of budget-friendly, consumer-oriented drives such as the SN550 and its SN570 successor reviewed here. Western Digital offers a range of color-coded storage solutions-WD Green products are eco-friendly, WD Red drives are for network-attached storage, and WD Gold products for data-center and enterprise use, for instance. Consider it a solid pick for a terabyte M.2 stick on a budget.

It's faster than its predecessor, the WD Blue SN550, and delivered above-average results in most of our benchmark tests, in a few cases even beating the Editors' Choice award-winning Samsung SSD 980. Western Digital's latest budget-priced internal solid-state drive, the WD Blue SN570 (starts at $53.99 for 250GB $109.99 for 1TB as tested), is a solid performer among affordable NVMe SSDs, even though it sticks to the PCI Express 3.0 rather than the newer 4.0 interface. How to Set Up Two-Factor Authentication.How to Record the Screen on Your Windows PC or Mac.How to Convert YouTube Videos to MP3 Files.How to Save Money on Your Cell Phone Bill.How to Free Up Space on Your iPhone or iPad.How to Block Robotexts and Spam Messages.

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