I just bought my external hard drive from b&H and I read that it says:
Windows XP, Vista, 7; Mac OS X 10.4, 10.5, 10.6
USB 2.0 port
Note : In order to use a drive larger than 2 TB, you will need an operating system that can partition and format that drive. Windows 7, Vista, Windows XP (64-bit), Mac OSX 10.4.x (Tiger), Mac OSX 10.5.x (Leopard), Mac OSX 10.6.x (Snow Leopard), and Mac OSX 10.7.x (Lion) all have this capability through the GUID Partitioning Table (GPT). The GUID partitioning scheme has the ability to partition both internal and external drives far beyond 2 TB’s in size.
But my computer cant read it, I can fromat it and use it!