I like to make backup copies of critical files such as email, documents, etc. to DVD re-writable discs. However, say I backed up some files last week, and I just want to make an updated backup of my email only, the software warns that everything on the DVD will be erased. Why aren't CD's or DVD's drag and drop like floppy discs used to be?
Please explain in style of "CD's and DVD's for Dummies", as this board gets very technical and I joined EE because I'm not. You can build up to a higher level intellectually, but I need the kindergarten version as a background.
This takes more work, so I'm awarding 500 points. Also, any good links count as well.