More cost efficient alternatives are also available but imply various amounts of manual intervention. You could use software that allows file sharing between Macs and PCs. There are a number of solutions out there, some of which are freeware (i.e.: Samba). Others can be purchased (DAVE, ADmitMac, etc.). Once you have setup file sharing, files can be transferred from the Mac to the PC and subsequently copied (backed up) to DVD. Depending on the sophistication level of the file sharing utility you choose, additional steps may be required to preserve the Mac file attributes. For example, using a "ZIP" type utility on the Mac to package the files prior to sending them to the PC would ensure that Mac file attributes are preserved within the package.
This was first published in July 2005