I use a SCSI Zip 100 on my Macintosh Plus and an USB Zip 100 on the my 2009 iMac to transfer stuff. I picked up the ZIP drives very cheap on eBay and this set up works like a dream. The iMac is dual boot... I need to boot the iMac in 10.5 (Leopard) to do this as later versions won't let you write! Booting up on the Macintosh Plus is faster and quieter with the ZIP.