Seagate is now shipping the first 4TB HDD that uses 1TB platters. The disk can be found online under $199. To put that kind of storage space in perspective, Seagate says its 4TB drive is nearly 800,000 times larger than the first desktop drive it introduced way back in 1979. 

There's enough storage space to tuck away 800,000 photos, 450 hours of HD video, or over 1 million songs, "all at the lowest cost per gigabyte in the industry," Seagate says. The drive also boasts the highest average data rate of any desktop HDD on the market at 146MB/s. At the same time, it consumes 35 percent less power than the competition, Seagate claims. Other features include 64MB of cache and a 7200 RPM spindle speed.

The drive also boasts the highest average data rate of any desktop HDD on the market at 146MB/s. At the same time, it consumes 35 percent less power than the competition, Seagate claims. Other features include 64MB of cache and a 7200 RPM spindle speed.

You can find the drive online in retail trim for around $212 shipped, or as low as $190 for the bare drive.