Give your NAS a massive storage upgrade with this 16TB WD Red Pro hard drive deal

Western Digital's WD Red Pro NAS drive line is designed for businesses small and large looking to max out their storage.

Having benchmarked several, it remains one of our favorite internal drive brands - and right now, the WD Red Pro 16TB NAS drive is now $690 (was $705) at Amazon , so long as you tick the coupon box.

Designed for demanding environments, Western Digital rates this model for workloads of up to 550TB per year and continuous 24/7 operation.

I've also spotted the NAS drive for the same price here at Newegg when you use code 16TB Red Pro NAS Internal Hard Drive: was $704.99 now $689.99 This 16TB hard drive offers 7,200 RPM performance, SATA connectivity, CMR recording, 512MB cache, 550TB-per-year workload rating, 24/7 operation, NASware technology and a five-year limited warranty.

For the full discount, tick the coupon box.

View Deal The WD Red Pro 16TB is also $690 (was $705) at Newegg with code LDSF324 Why we recommend it The WD Red Pro is specifically designed for demanding NAS environments, with a 7,200 RPM spindle speed, 512MB cache and CMR recording.

It's rated for continuous 24/7 operation, with workloads up to 550TB per year.

It can be used in RAID-optimized NAS systems regardless of the number of drive bays, and NASware technology is designed to improve performance and compatibility.

There's also a five-year limited warranty.

In his 4-star review of the smaller 14TB model, our expert Mark said it was "difficult to argue with the resilience of this drive," adding that "lots of resilience tricks and low power consumption are the hallmarks of this design." Similarly, the 24TB model received 4 stars in his review , where he praised Western Digital's Red Pro line as offering "good performance and massive capacity.

And, if the business can afford them, these are a good choice." For more options, take a look at our roundups of the best NAS hard drives , and the best 167 hard disk drives worth buying .

Also consider IronWolf Pro 16TB: was $614.99 now $539.99 Designed for 24/7 operation, Seagate's IronWolf Pro NAS drive delivers 7200 RPM spin speeds with 256MB Cache for high-speed file transfer.

View Deal Price context & historical value At $689.99 after the Amazon coupon, you're saving $15 against the current $704.99 price.

That's only a little over 2%, so this is only really worth snapping up if you desperately need to upgrade early.