The front of the device houses a USB port, a power button and status LEDs, a USB port, and a large, clear LCD display. The later has two buttons next to it to cycle through its display options (device IP, date and time, used/available capacity) and control the one feature that's accessible through the device itself QuikTransfer. Plug a USB flash drive into the front port and you can quickly transfer its entire contents into a folder named after the USB key, in the QuikTransfer folder on the StorCentre.
Around the rear there are a further two USB ports, dual gigabit Ethernet ports a reset button (use this unintentionally at your peril) and a Kensington lock attachment so you can ensure nobody runs off with your precious data. Three USB ports in total might seem like overkill but a number of devices can be connected, including an optional Bluetooth dongle, printers or security cameras. The latter can then be set-up to save their output to the StorCentre, eliminating the need for a computer which is pretty useful. Iomega recommends using Axis cameras, but most should work.
Unsurprisingly, given Iomega is a subsidiary of EMC, its Retrospect backup software is bundled. There are fuller featured solutions available, but there's nothing fundamentally wrong with Retrospect as a backup solution. The provision of a three year warranty is noteworthy, too.
EMC's involvement in Iomega's NAS products really makes itself known in the user interface. I'm pretty much convinced that for shear ease of use it's the best I've used on any NAS device of recent times. The main menu comprises an array of icons, with the ix4-200d's functions divided in to well-considered categories. Where appropriate there are helpful info-graphics (for example, the possible drive configurations you can use) and I never once found myself aimlessly hunting around trying to find an option because it was in an obscure sub-menu. Heck, it even works fine on an iPhone.