I use Mitsui Gold, unbranded surface, 74 min, 650 MB. These are CD-R and not rewriteable. For preservation purposes I would not go above the the 74 min/650mb. For the User copies, that is a different story, as many people are going to be getting their hands on them, and from experience, a lot of people do not know how to hold a CD, thus fingerprints etc occur. There are problems I have encountered with 80 min CD-r's and especially if you fill the entire CD to the limit. Some will simply not play in a player at all. I would not even consider re-writeable CD's when archiving. Personally, I have used DVD's as a backup only and I must admit, I do not trust them. I prefer to have my backups on a separate hard drive and then backed up again to tape. Call me paranoid, but this is valuable audio we are preserving. Hope this helps a little. Marie O'Connell Sound Archivist Mississippi Department of Archives & History 200 North Street Jackson, MS, 39201 Ph: 601-576-6909 Anonymous SET ARSCLIST DIGEST wrote: > In his post Dave Nolan said, > > ...writable CD/DVD copies are turning out to have SO many problems with > longevity past 10 years that it seems that they are NOT good long-term > archival storage media. > > Could you please elaborate on this. > > Thank you, > > Kevin Irelan