So for the record, DVD-RAM is a recordable-storage format for data. It will read most DVD discs and CDs, but you will not be able play DVD-Video from an external DVD-RAM drive. This is because the Apple DVD player doesn’t recognize the DVD-RAM if it isn’t Apple’s own. What DVD-RAM does do is hold huge amounts of data, making it ideal for backing-up data. A 9.4GB disc stores data on both sides, so it needs to be flipped over manually. The only thing stopping drives being built with read-write abilities for both sides of the disc is price. The problem with even the lower end Macs shipping with a 10GB hard drive is back up. Floppies are long gone, and you would need a stack of them. Even Zip 250 disks are not up to the job of backing up anymore. Using CDs to back up is a fairly cheap way of doing it, and Jaz 2GB is convenient and quick – though expensive. There is the option of using large-format optical drives, which are also expensive but faster than the DVD-RAM. The new large format DVD-RAM is the cheapest and most convenient way to back up your hard drive.
There is a huge choice for removable storage, but most are suited to moving files between computers, rather than as back up. Often the only realistic way to handle backup for machines with such huge drives is to use tape drives. However, tape drives are slow and difficult to use in comparison with DVD-RAM. DVD-RAM has reached a point where it’s indispensable for both personal and network back-ups.