- I start with the originals in my camera.
- I import all files to the local drive on my computer (1st copy).
- I then kick off a process that copies the files to my file server (2nd copy).
- At any time after this I will remove the images from the camera. I usually wait until just prior to my next shoot. One of the steps I go through while setting up the camera is to clear out the old images.
- Each evening my file server is automatically backed up to another drive (3rd copy).
- Once the local drive on my computer has accumulated enough to fill a blu-ray disc, I burn and verify three copies. I use at least two different brands of media and burn on at least two different burners (4th, 5th and 6th copy). I'm paying sixty to eighty cents per disc. I generally use Memorex, Ri-Data and Maxell and have had a very high success rate (95%+).
- After burning the blu-rays, the 1st copy is removed from the local drive, bringing me back down to five copies.
- Each blu-ray is stored in a different fire proof safe, one of which is off site.
I recently purchased a large safe that has both power and Ethernet inside. I'm considering moving either my file server or one of the backup drives into this safe as my computer and file server are currently vulnerable to theft, fire, flooding, etc.
Also, several of my better images are loaded at full resolution to an online site. If all of my other backups failed, I would still have access to the cream of the crop.
I don't use raid 1 (mirroring) as raid is NOT a backup strategy. Raid is a tool for reducing down time and can be very effective for this, however as others have said here, additional backups are still required. In my case raid would be an unnecessary use of resource, since should my drive fail, I could bear a couple of days of down time, while recovering from a backup.