Hello. I have a 15 inch macbook pro and an external 80 gb harddrive and an internal 160gb hard drive. I have removed the 160gb hard drive already formatted as fat32 and inserted it into the 80 gb hard drive casing and the 160gb hard drive is not recognized. Yet, when i replace the 160 gb hard drive with the 80 gb hard drive it is recognized. When plugged back into the Windows machine that the internal hard drive originally came from, it was recognized and listed as fat32. when the usb external hard drive was plugged into windows again, it too was recognized. any idea as to how to get the 160gb hard drive recognized? the usb enclosure shows up in system profiler when the 160gb hard drive is plugged in. im going nuts! *NOTE* i have not tried plugging the 160 gb hard drive into the enclosure than into the windows machine. i am going to try that now and then update.