The new Seagate Laptop HDD means big storage in a small package. The Laptop HDD is the highest-capacity mobile hard drive for DIY external box setup for upgraders. Each drive can store more than 1 million songs or 480 hours of HD video. This drive also consumes less power than Seagate and competitive 3.5-inch desktop HDD's. Size matters, at 2.5- inches, it's smaller than your regular 3.5-inch desktop HDD, yet delivers a whopping 4TB of capacity to satisfy your need for storage. Excellent for external storage, all-in-one PC storage and ultra-slim desktop storage.