Buying blank DVDs or choosing a DVD recorder can be confusing if you are not sure about the difference between the DVD+R and DVD-R formats. Both types of discs can only be written to once, but can be read multiple times. The difference lies in their formatting and how they read data from the disc.
What is the difference between DVD-R and DVD+R? : DVD-R vs DVD+R, Which is Better? : What is DVD+R?
DVD+R and DVD-R discs look the same. They are both 120 mm in diameter and 1.2 mm thick, and consist of two polycarbonate substrates of 0.6 mm each. The discs are labeled as DVD+R or DVD-R.
DVDs are generally very data-resistant and do not wear out with repeated use. Unlike VHS cassettes and floppy disks, DVDs are not affected by magnetic fields.
On one side, each DVD media disc, whether DVD+R or DVD-R, can hold up to 13 times as much information as a standard CD. A single-sided/single-layer DVD has a storage capacity of 4.7 GB, while a single-sided/dual-layer disc has a storage capacity of 8.5 GB. A double-sided/single-layer disc can store 9.4 GB, while a double-sided/dual-layer DVD has a storage capacity of 17.1 GB.
