You will find on the front panel of the HAF XM it has a total of four USB ports. Two of them are based on USB2.0 standard while the other two are USB3.0. In order to use the USB3 slots, your motherboards needs to have USB3.0 header available as the connector does not fit to USB2 headers.
All hard disks, both internal and in the X-dock, are secured using separate HDD caddies. Installing a hard drive in the caddy is completely toolless and all you need to do is to bend the caddy a bit, and put the hard disk in and install the HDD in your case.
The general layout of the case is basically like in any other case these days. Optical drives and HDD slots are located in the front section of the case along with a large front fan. There’s enough space for even the larger graphics cards and the motherboard is located in the upper left corner of the case. A Power supply is located in the bottom half.
Optical drives can be secured in the case using toolless connectors. Just turn the switch to lock-position and your drive should be secured in the case. Nice and easy!
As we saw earlier, the HAF XM has a separate caddy for two hard disks. The backplane of the caddy requires two SATA-connectors and one molex-power connector. Personally, I would have liked to see the power connector as SATA connector, since power supplies have very limited amount of Molex connectors these days. Other than that, the caddy for removable hard disks seems well designed.