I learned it the hard way.
After shooting a full gigabyte of photos stored on a microdrive only to find the drive failed when I tried to transfer the data from the camera to PC. The whole giga byte of photo was worthless.

Microdrive is not as reliable as compact flash because it has mechanical parts that are bound to fail, sooner or later. So, learn from others' failure and avoid your own. Use a microdrive only when you can afford to lose your work.

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