[Omah]

DVD-R

DVD-Rs store digital data onto a disc. The information is engraved into one or both sides of the disc by a laser, depending on whether the disc is double sided.

DVD-R is best for storing data that never changes.

DVD-RW

DVD-RW also stores digital data engraved by a laser. The DVD-RW format allows the user to erase and rewrite data, whereas this is not possible on the DVD-R.

According to Pioneer, the developer of the DVD-RW, a user can rewrite data on a DVD-RW about 1,000 times.

DVD-RW are best for storing home video recordings and backups of data that changes frequently because they are rewritable. DVD-RW is also a good choice for storing data collections that get larger over time, such as photographs.


There is a significant difference in cost - DVD-RW are (roughly) 2-4 times dearer than DVD-R, so, if you are only going to record once and then file the DVD, R is the cheaper format

There is a significant difference in recording speed - Typically, DVD-RW records at 4x, whereas DVD-R records at up to 16x, so, if you going to record lots of DVDs, R is the faster format

I buy Verbatim DVD-Rs at, roughly, £15 per 100 and DVD-RWs at (roughly) £50 per 100