This case has four external 5 ¼” bays and seven 3 ½” bays, all using a terrific screwless mechanism for installing drives (see Figure 12). From the seven 3 ½” bays available, the top two come with screwless mechanisms for holding floppy disk drives, but the case has only one opening for using an external 3 ½” drive – the second 3 ½” external opening is used to hold the USB ports and microphone and headphones jacks. The good news is these two top bays are compatible with hard disk drives, but you will need to use regular screws on them. In summary, you can have up to seven hard disk drives installed if no floppy disk drive is used (five using screwless mechanisms and two using regular screws). Of course if you have an external 3 ½” device (floppy disk drive, memory card reader, etc), the limit drops to six.

click to enlarge
Figure 12: Disk drive bays.