OK, well it has a main bay and an expansion bay.
Both have white front covers and I suppose the closest appliance would be a microwave. So it looks like two white microwaves.

As for storage, the main bay has a card in a slot next to the PSU which has a memory card sticking out of it that looks like a PCMCIA flash drive. It may not be PCMCIA, but the form factor is pretty close. The Flash card is labelled SX200 LWN (at least that's what I think it says, it's hard to read the card as most of it's behind the smoked plastic front of the card and the letters LWN are in a silly stylized font that runs the W and the N together.

I was always told it was an analog system. Though it has digital phones I didn't think this was related. My understanding was that digital referred to the ability to interface with digital trunks like ISDN etc.

Nothing is labeled on the system itself and there are no real manuals with it. Just for the console and basic voice mail operation etc.