WD 4TB BLUE WD40EZAX (5400 RPM)

Works well, but it could have been larger. PLEASE BE WARNED! 4 TB does NOT mean exactly 4 TB unless you know how to measure. Western Digital makes very good hardware, but they're a bit sneaky on advertising the drive sizes. Most drive manufacturers will market a drive saying that it is a specific size when in fact the actual usable size is smaller. Basically, they use byte sizes measured in steps of 1,000 when the computer will actually read them in steps of 1024. Thus, the ACTUAL readout will be approx. 3.6 TB, NOT 4 TB. Knowing this beforehand would have saved me some trouble planning on hardware upgrades. Still, this drive does well, and it has some nice built-in features that will keep it stable for years to come. WD is an excellent hardware brand, and they include features that no other hard drive brand has, but don't be fooled by size measurements!