Nice! I loved that phone, was one of my favourites. One of the only, if not the only phone I ever owned that had a metal shell that I an recall.

I had most of the N range, and was particularly interested in music ones, N95 was love/hate because the music button/reverse slide was so slow sometimes, and generally it just wasn't as good as N91 for music listening with its proper headphone jack placement, and always accessible controls.

What kind of magic did that HDD have that it could be thrown around like a phone typically is without the issues we would see if we'd handled a laptop with HDD the same way?

Had an accelerometer that turned off hard drive when motion detected. High end ibm thinkpads had that too. Turns out if seek head is parked properly, its fairly robust

N91 also had a ridiculously high quality DAC that beat pants off iPods of that gen.