Good and valid points on the Zip cartridge. I do check on them regularly for what's there. Also I have the taxes backed up on-line. The only things I keep on electronic media are those things that will only be useful - needful if there is still electronic infrastructure such as taxes. If they lose their copy (the IRS) what need do I have for mine? When I get a burner I will be carrying these things on CD as you suggest but for now I use the media I have.