I have purchased an external logitec usb hard drive, and connected it to my computer using windows xp, as well as my laptop using mac osx. I formatted 2 partitions in the hfs plus format through the mac, and used a software called mac drive in xp to read and write onto the mac formatted drives. Everything was cool for a few days, and I began to transfer and add my windows data to backup on the external drive. One night I left the computer on overnight as I needed to download some heavy information from the web, and the download was coming through windows xp into the external usb hard drive. The next day I showed up at the computer, everything was fine, and I turned it off. Next time I started the computer though, it would simply crash and reboot automatically. I unplugged everything and then added them one by one until I found out that the computer crashes everytime I turn on the power to the external usb hard drive. When I boot up windows without the drive it loads up fine, but as soon as I turn on the hard drive, the computer begins to recognize it and then gives me the blue screen of death for about a second and moves right into rebooting. Can you please let me know if there is any hope or if I have lost all my data and need to reformat the external usb drive. thank you for your help. be well g

So what's it do when you connect it to the Mac laptop? And have you tried reinstalling the software you use to read the Mac formatted drive?

When I conect it to the Mac laptop, the mac does not recognize my problematic partition as formatted, but it does recognize a second partition I have made in the same external usb hard drive. I have tried reinstalling the software, but to no avail.