Spokeman, If you have not already purchased your SSD, I recommend that you up it to at lease a 1 TB SSD. The reason is that although DCS, as Phantom88 said, will fit on the drive with room to spare, it won't be long before you will wish you had more drive space. Hard drives, like closets and drawers, have a way of getting filled. The cost difference between a 500Gb and 1 TB SSD is about $50 USD or $10 per 100GB. If you can afford the additional money, I think you will find it well spent down the road. Like the old adage of flying where you cannot have too much runway in front of you, altitude below you, or fuel, you cannot have too much drive space.