Why Bother ? , the micro drive only offers approx. 100k of slow storage, and there are better options for all the machines listed above. But how do you get the precious data from your old microdrives to those Floppy disks. Hopefully you have a better chance once you have read this.
The basic Microdrive Media, it is in essence a small ( ?? m/m wide ) loop of Video Quality magnetic tape, approx. ???? long. Formed into a continuous loop, and driven past a read/write head by a single motor. The Media is supposed to have a limited life and some systems, included a pass counter, to log the life of the Media. It is true that if a Microdrive cartridge is starting to give errors, that it may be worn out, but I have cartridges that are now over 17 years old, run each time the OPD is powered up, and still perform error free.Two things help to make this possible, first the drives are cleaned ( see the inset Image of the drive) and just look at the Dust particles. Normal dust is soft and jams in the drive spaces, but it can be removed. However grit will cause permanent damage, to either the Media or the head. So how to keep the unit clean, a blast from an air spray, once in a while, is all that it takes. Keep the media in a closed box, when storing it. Or even better leave the media in the drive, it forms a good dust seal on most designs of driveSee drive Image and simple schematic.
( Item Z ) in the picture is the Rubber drive sleeve, although these seem to last forever,the passage of the tape can sometimes produce a groove in the roller. The good news is that this is usually at the top of the roller, and the lower half is unused and as such, still ok. Carefully pull the sleeve up and off of the drive shaft, turn it upside down, push carefully back onto the spindle, and in most cases not only does the drive stop giving errors. But the drive becomes much quieter in operation.