shutterbug, if you want access the the data quickly and easily you can't go past large drives. They are rediculously cheap nowadays compared to other solutions. Plus the data is always online which saves hassle.
If you are looking for a good backup solution, thats a bit more complex..
In the past I've found optical media can be unreliable. If/when they state degrading you have no warning that your data just went AWOL.
I store all important data on a large hard drive. A separate copy is on a backup drive - preferably at a remote network site. I also archive the data on "good quality" discs (previously CD, now DVD) as well, just in case.
Advantages:
- Immediate access to all data
- Automated integrity checks and drive monitoring. I know fairly quickly if there is data loss on one of the drives so I can fix it.
- Automated backups so I can't forget them.
- Remote backups protect against against theft / fire / etc..
- Immediate backups. I hesitate to burn a DVD every time I take a couple of photos, it would be wasteful and time consuming. With a backup hard drive I can easily push the new data into the backups before formatting my CF card.
If you rely on optical media I'd recommend making sure there are at least 2 copies of everything and that you verify the the discs immediately after creation and every year or so after that. The verification step is a bit of effort, it might just be easier to recreate the backups periodically
. Store the discs vertically in a dark/cool/dry location. One of these backup sets could be kept offsite if you don't have a remote hard drive.