Nothing. The trick is to cycle through duplicate back ups. What I have found is that the new USB storage devices are so large on a conventional machine you can keep several copies of everything and never worry about data loss. I did have old PCs that I had salvaged networked just for hard drives. The Amiga OS and software is so small I could copy most stuff in a fraction of time. I gave up with CD's and DVDs cus of access. You really cant beat a couple of either external USB drives or series of old PCs. Just make several copies of everything and have a backup routine. I have the Amiga networked to several machines and have FTP access to my online storage.
If you want your stuff to last for life then get a domain, online storage, spread it across the web and give others access to it. Interestingly I have been asked by several people to keep copies of their Amiga OS and software cus there machine had broken. I have special areas on my website for storage of information and software and have even a second domain with hosting for all my demo and PD disks.
Someone also pointed out that stone outlives everything.
CDs and DVDs are worse than floppies cus once damaged the whole thing is shot, at least with floppies I could salvage something. I really don`t trust any removable media. Its also a pain to find stuff and the drives get updated all the time as does software.
You can pick up an old PC for a couple of quid and stick in a couple of hard drives and using even a crude parnet can safely transfer your beloved Amiga software. Also get SCSI on the Amiga off a Blizzard or Squirrel and get a couple of external drives with 4GB hard drives in them. Mac style old ones. As I say the Amiga OS is so small would take an age to fill.
Backup and duplication is the key. And being able to get at the data ' all the time ' not by sifting through endless discs, disks etc etc.
