Meet WD's new "business-ready" NAS. WD has revamped its range of network-attached storage (NAS) solutions with the introduction of various My Cloud models that tout a good mix of performance and ease of use without breaking the bank.

The premium and complicated nature of the firm's earlier Sentinel units seems a distant memory, with simplified My Cloud models now covering all bases, from entry-level single-drive units to the prosumer EX Series and, at the top of the tree, the business-ready DL Series.

We recently came away impressed with the four-bay EX4100, calling it "one of the more user-friendly NAS devices on the market," but the expansion of the My Cloud range makes the decision-making process that little bit more complicated, and if you've perused WD's high-end NAS portfolio, you may be left wondering: what's the difference between the EX and DL SKUs?