These vital files are on a Power Macintosh G3 (about 20 years old) which has no usb port. I've tried to connect the two with an ethernet cross-over cable, with no success. Then I realized this old mac has an internal zip drive with the 100 MB disk still inside! So now I'm able to copy the files, 100 MB at a time, onto this zip disk. Any ideas on how I can get them from the zip disk onto a usb flash drive or onto my imac?