difference between DVD-R, DVD-RW, DVD+R, DVD+RW
Can someone explains the difference between DVD-R, DVD-RW, DVD+R, & DVD+RW?
I need to buy DVD backup disc (because my DVD burner going bad and can't
read/write CDs). All I need to do are once-time simple backups - nothing fancy.
[It seems that DVD-R would be the most economical buy for me, but I want to
be sure before I buy.]
Thank in advance for any explanation.