There is enough space for three 5.25" drives and six 3.5" internal drives. All of the 3.5" drive bays are directly behind the 120mm fan bays in the front of the case, so all you need to do is install fans and the drives will be nice and cool. There are no 3.5" external drive bays (or 5.25" to 3.5" bay adapters), so those with 3.5" floppy drives or flash card readers are out of luck. There are no removable rails or trays for the drives, they mount using plain screws (or the included thumbscrews for 3.5" hard drives).
Two fans come factory installed in the case. One is a 140mm Antec Tricool exhaust fan at the top of the case, and the other is a 120mm Antec Tricool exhaust fan at the back of the case. For those not familiar with Antec Tricool fans, they include a built-in speed control module allowing the selection between Low-Medium-High speeds. A spare uninstalled 120mm Antec Tricool fan was included in the packaging, and can be installed in any of the open ventilation holes. Interestingly, no fan mounting screws were included, so you'll have to find your own.
The other side of the interior of the case is simple, with the only notable feature being a cable management area. There are a total of seven tie down points that can be used by the two included cable ties (or your own zip ties). This area is hidden from view from the other side of the case, and looks to have ample space for hiding and routing cables.