I use a rewritable DVD to back up my pz3's and image files so I can add to it as I go along rather than leave them on my PC until I have enough for a complete DVD.
Once my Rewriteable is full I'll copy it to a Write Once DVD and store it.
The rewritable is then erased to use again!

My runtimes are backed up to XHD once a week!

Injustice will be avenged.
Cofiwch Dryweryn.