Hi - I previously posted my newbie post with scant info. If one of the moderators can delete that post I would appreciate it. I now have more information. First time user of TH11, just downloaded from Acronis. Attempting to make a full image backup (C: has about 4.4 gigs, reinstall of winxp pro). Backup to CD; using CD-R, 700 meg disks, should take 4 of them with the next to the highest compression level. Getting E00040004 errors, Acronis starts to write to disk 1; goes several minutes; error disk is full; possible reason may be poor media quality press retry to continue with volume 1 Am I doing something wrong with this backup? Should I go to Stales tonight and get DVD writable disks or cdroms that are RW? I am attempting to make this backup before I download MS updates, and install user programs, so that I have a clean image of the resinstall. Any help would very much be appreciated. Thank you.