Hard disk acess problem

Hi,

What the message mean is that Windows can not read/understand the filing system (something like the Table of Contents in a book) and therefore do not which and where are your files in the 80Gb.

A few things you can try:
1. Run Windows Scandisdk on the Hitachi 80Gb;
2. Run any third party disk check/utility such Norton Disk Doctor.

Alternately, you can use a file recovery software (such as GetDataBack) to recover/copy all your important files from the 80Gb and transfer them to another mass storage device. Thereafter, you can re-partition and re-format the said Hitachi to start new/fresh/clean.

Hope this be of some help/idea. Post back how things turnes up or should you need further information.

Good luck and kind regards.