Thanks for your replies John, Chris, Maurits, Michael and f-erence, and sorry it's taken me so long to reply. On 22/01/07, I asked: >> Is there a good way to archive 24-bit audio files in OS X? > Chris Coccia wrote: > Just burn the whole project folder to a DVD or two? That's what I ended up doing, although it took 7 DVDs (including all the artwork scans, etc.) not 1 or 2. John Abram wrote: > Not sure if it's an option for you, but the folks at Vienna Symphonic > Library swear by WinRar - they claim it is very efficient. I imagine > this would only work on a Windows of MacIntel machine though. Chris Coccia wrote: > SimplyRAR is for Mac OS X and works just fine on my PPC G4. > Not sure if its UB by now or not, been awhile since I looked for an > update for anything on my machine.. I tried 3 different OS X rar programs, including SimplyRAR, but none of them worked very well here. The files either wouldn't decompress because of errors, or didn't compress very much in the first place, or both. Didn't give me much confidence about trying WinRar on my rarely-used PC, especially with the extra mucking around required to get the files onto it, and the approx. AU$40 cost. Even Zap didn't work as well as I thought it would. Using "diff" in the Terminal (thanks Maurits - I've used it a few times since you mentioned it on this list!) I found that un-Zapped files were NOT always identical to the original files. Dunno what went wrong, but even a couple of zipped files wouldn't decompress! =:-O So I've now got a couple of piles of DVDs. Maybe in a couple of years I'll be able to transfer them all to a nice cheap blu-ray disc...? ;-) Cheers, Bill