Excerpt: If low cost is your primary concern, you’d be hard pressed to find a better drive for the money than Hitachi’s
Pros: Affordable. Inexpensive compared to more portable models. Stackable design, which eases expansion.
Cons: Needs to stay connected to the power supply, so it’s not portable. Hitachi’s cloud-based backup software isn’t nearly as simple as setting up a Dropbox account, or a cloud storage account from some other provider.