Joe, it's not "like" mini hard drive. It is a mini hard drive, in the format of a thicker Compact Flash card. (CF Type II, to be precise.) And what's funny, the biggest microdrive I saw was 2.2 GB, while the biggest CF is 4GB. The problem with microdrives is that they draw more power, so your batteries might get empty much quicker. BTW, the original MicroDrive was done by IBM and had 380 MB.

-- erlik