Hard disk capacities are growing at an ever-growing rate and the cost per gigabyte has gone down to the point where $99 can get you 2TB of storage space, that’s a mere 5 cents a gigabyte. This compares to the thousands of dollars you would have to spend on a hard disk 20 years ago, or several hundred dollars per gigabyte.The reason costs have gone down is that the density for each platter on the hard drive has increased while the size of the drive has remained the same. Another factor is the advent of Solid State Drives for the mainstream user.
Western Digital has been making HDDs for a long time being one of the oldest consumer hard disk manufacturers and was one of the fist drive manufacturers to hit 1TB for consumer hard disks and 2TB of storage space. Today they are launching the first 3TB Hard Disk drives and to hit the market the Western Digital Caviar Green 3TB drive. This drive is retailing for $249, making it an interesting alternative for those wanting more storage space without paying the cost premium that a SSD would require.