PC storage is this Prime Day’s stealth bargain. Looking for an internal or external SSD that holds terabytes, not just gigabytes? Our experts lay out the top tested picks at the best prices.

The UnionSine DataPocket 500GB 2.5-inch slim portable external hard drive is the item in question, which was priced at $28.28 on Amazon at the time of writing (although its regular price is $33.27).

Think your hard drive might be failing? Here’s how to test your SSD or HDD and catch problems early.

Plus, Walmart Deals of the Day are here to save you another $50 on the Editor’s Choice-winning Garmin Venu Sq 2 smartwatch and nearly 30% off the AirPods (3rd Gen).