A backup drive spends most of its life in a drawer and matters only on the day something breaks. It has to still work after two years unplugged, survive being knocked around, hold a whole photo library, and keep private files private. The picks below each deliver on one or more of these fronts.

Handing a folder to someone else is where cloud sync stops being the answer: a locked-down office laptop, a client with no upload speed, forty gigabytes of video due today. Sustained write speed, dual connector ends, driver-free use, and pocket size are what matter. Products here qualify by meeting at least one criterion.

Phone storage fills up on holiday, usually mid-trip, with no laptop around. Clearing space means moving video off the phone directly. A connector that fits the phone, no adapter in the chain, video offload speed, and a slim body around a case are the rubric. Each pick below earns its place through at least one.