The WD Black SN850X is an M.2 SSD rated for use in laptops and desktops, and if you’ve got a PC that you’ve been avoiding upgrading due to high SSD costs, now is the perfect time to buy. Right now at Best Buy, you cansave 53% on the 4TB model, bringing the price to $800. That’s a discount of over $900, bringing the cost closer to pre-AI pricing.
Also: The best M.2 SSDs you can buy
Don’t need that much storage space, or do you need more? The SN850X is also available in 1TB, 2TB, and 8TB capacities, each with its own steep discount, so you can choose the version that best suits your needs now and gives you room to grow. Each version features read and write speeds of 7300 and 6600 MB/s, respectively, giving you much faster loading times in games, quicker app launches, and easier access to your most-used files.
Also: SSD vs. HDD
The WD Black SN850X is tailor-made for premium gaming, featuring predictive loading to keep the most-used assets ready for faster load times. The SSD is rated for read and write endurance up to 2400TB, which means you can completely fill your drive 600 times over before you have to worry about hardware failure.
How I rated this deal
Whether the AI bubble has finally popped or Best Buy is simply trying to move stock, a 53% discount on a 4TB SSD is a deal too tempting to pass up. Especially if your PC or laptop has been in desperate need of a storage upgrade, put off by eye-popping SSD prices. While the price may still be a bit rich for some, at $800, it’s much closer to pre-AI costs than I’ve seen in a very long time. That’s why I gave this deal a 5/5 Editor’s rating.
Deals are subject to sell out or expire anytime, though ZDNET remains committed to finding, sharing, and updating the best product deals for you to score the best savings. Our team of experts regularly checks in on the deals we share to ensure they are still live and obtainable. We’re sorry if you’ve missed out on this deal, but don’t fret — we’re constantly finding new chances to save and sharing them with you at ZDNET.com.
We aim to deliver the most accurate advice to help you shop smarter. ZDNET offers 33 years of experience, 30 hands-on product reviewers, and 10,000 square feet of lab space to ensure we bring you the best of tech.
In 2025, we refined our approach to deals, developing a measurable system for sharing savings with readers like you. Our editor’s deal rating badges are affixed to most of our deal content, making it easy to interpret our expertise to help you make the best purchase decision.
At the core of this approach is a percentage-off-based system to classify savings offered on top-tech products, combined with a sliding-scale system based on our team members’ expertise and several factors like frequency, brand or product recognition, and more. The result? Hand-crafted deals chosen specifically for ZDNET readers like you, fully backed by our experts.
