Removable Media Storage Capacity

DVD

DVD-R capacity is 4,706,074,624 bytes
DVD+R capacity is 4,700,372,992 bytes 4,590,208 K 4482 M

The two most common DVD format designations for DVDr media is DVD5 (DVD-5) and DVD9 (DVD-9).

• DVD-5 holds 4.7GB and is supported by the DVD+R/RW and DVD-R/RW formats. It is also known as Single-Sided Single Layer.
• DVD-9 holds 8.5GB and is supported by the DVD+R and DVD-R formats. It is also known as Single-Sided Double Layer (sometimes called Dual Layer).

Double Layer (sometimes called Dual Layer) and Double-Sided DVDs each hold more than the standard 4.7GB of a single-sided single layer DVD. Another two DVD types are DVD10 and DVD18, which are less common.

• DVD-10 holds 8.75GB and is supported by the DVD+R/RW and DVD-R/RW formats. It is also known as Double-Sided Single Layer.
• DVD-18 DVD-18 holds 15.9GB and is supported by the DVD+R format. It is also known as Double-Sided Double Layer (or Double-Sided Dual Layer).

DVD-R vs. DVD+R

DVD-R and DVD+R technologies are not directly compatible. DVD-R is older and somewhat more common. DVD+R is improved. Because the DVD-R format has been in use since 1997 older or cheaper DVD players are more likely to favour the DVD-R standard exclusively.

DVD+R is a newer recording technology created in 2002. DVD+R discs are less susceptible to write errors. DVD+R allows faster and more accurate disc recording than the existing DVD-R standard.

Blu-Ray

• A single-layer disc can hold 25GB.
• A dual-layer disc can hold 50GB.

HD DVD

Smaller than Blue-Ray.