Looks like the WD Caviar. Here is the basics; you should always partition your larger hard drives to place the OS on the C: partition and your storage (data) on your D: partition. This is a safety net in case you get a virus and you have to re-format your C. Then only your partitioned drive is lost, not your entire drive with your data. There are many ways to do this and you will find many opinions on how to do it. I would suggest a partition of 200 gb of the C and use the remainder as mass storage. I have a 200 GB total size HD for my C with the OS and only use 1/2 of it for over two years. You want half of your C drive free for speed. Trust me as a user of nearly 20 years with pc's. The more free space on your C the better off you are. So be careful on limiting your C drive to under 100 gb.
It should come to you new un-formatted. When installing the software it will format for you. You may want to check other threads on advice on partitioning your HD.
Looks like the WD Caviar. Here is the basics; you should always partition your larger hard drives to place the OS on the C: partition and your storage (data) on your D: partition. This is a safety net in case you get a virus and you have to re-format your C. Then only your partitioned drive is lost, not your entire drive with your data. There are many ways to do this and you will find many opinions on how to do it. I would suggest a partition of 200 gb of the C and use the remainder as mass storage. I have a 200 GB total size HD for my C with the OS and only use 1/2 of it for over two years. You want half of your C drive free for speed. Trust me as a user of nearly 20 years with pc's. The more free space on your C the better off you are. So be careful on limiting your C drive to under 100 gb.