I shaved family files on a cd and am now not able to retrieve any of the archive files. Here is the error message: you don't have the right permissions to extract archives in the folder. Each file ends with a .nco syntax. I have tried the chmod go-w,a+x /dev/cd0 with not success. Have never run into this before. It's been so long ago maybe the cd was saved as a backup using Microsoft, but cannot remember; if so, I'll enfringe on a neighbor who uses Microsoft. Thanks for any thoughts.