When I got my ZX Spectrum, it was buried under a pile of tuning capacitors and superheterodyne receivers, and I never noticed the 3 tiny little black boxes under a few 831 vaccum tubes. I don't have the actual microdrive, just 3 tapes in their casing.
I had a look at them, and the tape doesn't seem to be damaged. I won't ever use them, and nor do I want to.
Amiga 4000: Apollo Turbo 040, 128MB Fast, 40gb HDD, CD-ROM (needs internet)
C64: 1541U-II, MixSID, WiFi, LumaFix64
ZX Spec, A1200, CD32, MacPlus/SE, A500, BBC Turbo Master (NASA), 2600, Acorn 4000, VIC-20, IBM 5155, GameBoy