CalDigit is a popular maker of docks, external storage, and other accessories that work well with Apple's ecosystem, and the company recently released a new Tuff nano external solid-state drive that packs blazing-fast transfer speeds into a tiny package.

I don't have a huge need for external storage with my MacBook Pro, but when I have needed it I've used CalDigit's previous Tuff SSD, which I reviewed a couple of years ago. The original Tuff was available in both SSD and traditional hard disk versions, with the hard disks offering greater capacity at slower speeds while the SSDs offered faster speeds but with lower capacities and higher prices.