DVD-R vs. DVD+R....difference?

[97tbird]

sorry if this is a very generic "?", but I'd like to know the difference between the -R and the +R (and -RW and +RW).

 

[obbop]

One has more "R's" than the other?

 

[ToyotaNSaturn]

Checkout this link for all you want to know about DVD formats

 

[97tbird]

Thanks, guys.