Define Nano S

3.5" HDD/2.5" SSD positions
2
2.5" dedicated SSD unit positions
2 (fits SSDs up to 13 mm thick)
Expansion slots
2
Front ports
2x USB 3.0, Audio in/out, Power button with LED (blue), HDD activity LED (blue), Reset button
Total fan mounts
6
Front fan
2x 120/140 mm (included is 1 Fractal Design Dynamic GP14 fan @ 1000 RPM)
Top fan
2x 120/140 mm
Rear fan
1x 120 mm (included is 1 Fractal Design Dynamic GP12 fan @ 1200 RPM)
Bottom fan
1x 120 mm
Dust filters
Front fans, Bottom fans (ejects from the front of the case)
Cable routing grommets
Yes
Fixed velcro straps
Yes
Captive thumbscrews
Both side panels, rear HDD/SSD brackets
Left side panel
Industrial sound-dampened steel
Right side panel
Industrial sound-dampened steel