Question has been asked about what is the difference between DVD-5 and DVD-9, DVD+R and DVD RW, etc. Generally speaking, there are 4 different DVD Disc in market now. The most commonly used Disc to save video movies is D9 and D5. And the size of them can be kind of confusing for users.

First, DVD5 is cheaper than DVD9. If you want to make more copies of your favorite DVD movies, you'd better choose DVD5 disc to backup, it will save a lot of money.

Second, also another important thing: D5 is reusable and environmentally friendly disc.

You can see the disc you bought, which always display DVD-RW, DVD-R, etc. on their covers. A DVD-R is a write-once format, once you've burned the data onto that DVD platter, the disk is forever frozen with that information. Add the "W" to that, and you'll find that DVD-RW can be erased or rewritten up to a thousand times. In a similar way, the DVD+RW is defined as "DVD ReWritable" and DVD+R is defined as "DVD Recordable".

The DVD-RW and DVD+RW we always see at the market are DVD5 disc, it means that if you want to rewrite your DVD disc, you should choose DVD5 disc to backup your DVD Movies and data, you can reuse your DVD5 disc to backup different movies or data, such as write, erase, write, erase, again and again.

Difference D5 and D9: DVD-5 (Single Side Single Layer)

D5 holds around 4 700 000 000 bytes and that is 4.37 computer GB where 1 kbyte is 1024 bytes* . DVD+R/DVD+RW and DVD-R/DVD-RW support this format. This is the most common DVD Media, often called 4.7 GB Media. A DVD-5 disc will hold nominally 133 minutes of high quality MPEG-2 encoded video, together with three surround-sound audio channels and four subtitle channels. (Without video compression one DVD-5 disc would hold only about 3 minutes of video).

Difference D5 and D9: DVD-10 (Dual Side Single Layer)

D10 holds around 9 400 000 000 bytes and that is 8.75 computer GB. DVD+R/DVD+RW and DVD-R/DVD-RW support this format. A DVD-10 disc will hold a nominal 133 minutes on each side (ie 266 minutes in all), but the disc needs to be turned over to play the other side.

Difference D5 and D9: DVD-9, (Single Side Dual Layer)

D9 holds around 8 540 000 000 bytes and that is 7.95 computer GB. DVD+R support this format. This media is called DVD+R9, DVD+R DL or 8.5 GB Media. A DVD-9 (dual layer) disc and hold 240 minutes of continuous video.

Difference D5 and D9: DVD-18, ( Dula side Dual Layer )

D18 holds around 17 080 000 000 bytes and that is 15.9 computer GB. DVD+R supports this format. DVD -18 can hold 240 minutes on each side and the disc needs to be turned over to play the other side.

DVD+R/DVD+RW/DVD+R DL and DVD-R/DVD-RW exact sizes
DVD-R/DVD-RW = 4 706 074 624 bytes ( 4488 MB )
DVD+R/DVD+RW = 4 700 372 992 bytes ( 4482 MB )
DVD+R DL = 8 547 993 600 bytes ( 8152 MB )

This dvd copy for mac now can suppot Copy D5 to D5, D9 to D9, D5 to D9, D9 to D5. Most important, this DVD Copy for Mac software is quite easy to use and it takes only a few steps to copy the entire DVD, even able to remove DVD protections with high quality, almost no losing.

More related： best dvd copy software, dvd9 to dvd5 mac, dvd ripper for mac, copy dvd to dvd on mac