Over on the Nomadness forum, people are taking about their experiences with replacing the Zen Micro's hard drive with a CompactFlash memory card.
There's two reason's you'd wanna do this surgery:
1. The hard drive has died.
2. You want to increase the capacity of your Zen Micro. One user was able to upgrade the 5GB hard drive to an 8GB memory card.
A third reason is that the battery lasts longer, and that music starts much faster.
Warning! Some users have found that certain CompactFlash cards do not work. Read the posting to get brand names and model numbers of memory cards that work, such as the 8GB Transcend TS8GCF120.