DVD+/-RW are rewritable. So you can write or burn, and you can erase. While the DVD+/-R, you cannot rewrite.
As for the minus and plus sign. From what I see, the + is compatible with the newer DVD players and such. While the - is compatible with more DVD players, with older DVD player models.
The + though, is less prone to errors and interference during the burning process. And the + is more accurate for high speed.
just differrent formats. Just get dual format drive and you can burn to any type of disk. If you want to do dual layer disks then get a dual layer dual formal drive. I have noticed that some dvd players (for your tv) prefer a - or + format so it is nice to be able to burn in both formats.
DVD+/-RW are rewritable. So you can write or burn, and you can erase. While the DVD+/-R, you cannot rewrite.
As for the minus and plus sign. From what I see, the + is compatible with the newer DVD players and such. While the - is compatible with more DVD players, with older DVD player models.
The + though, is less prone to errors and interference during the burning process. And the + is more accurate for high speed.