Why can I open my MicroDrive CF card?
If the CF card was previously formatted for Windows or a digital camera, it may still look like a valid volume, and Windows will assign a drive letter to it even though the card holds nothing but Apple II data. It may even allow you to try to open files with garbled names. If try to use the CiderPress Open Device or Volume Copier features by selecting the drive letter, you won’t see your Apple II data. All you need to do is open the card as a physical (numbered) device rather than a logical (lettered) device. Better yet, update the CF card with the newer version of the utilities, available from Reactive Computers; this will clear out the Windows volume data so the problem (and some others) don’t arise.