Removable media have been part of personal computers since the dawn of the industry, ranging from punch cards, to tape cassette drives, to floppy disk drives and more. One of the forefronts of removable media now is the optical drive; the industry standard optical drive in today’s market is the DVD burner, which has more or less supplanted the CD-burner in the market place.
DVD-burners come in a variety of makes and models, and hardware specifications; all aimed (more or less) at the same market niche: People who need to back up large amounts of data for posterity. Like CD-burners before them, DVD-burners have become something of a commodity item in computer hardware.
If you’re looking at getting a DVD-burner, the best option is almost always replacing an existing CD-ROM drive. If your computer is so old that it doesn’t have a CD-ROM drive, it probably can’t use a DVD-burner in any case.
DVD-burners that go inside the case (internal mountings) use the E-IDE interface or the ATAPI interface. A very few use Serial ATA, for higher end DVD drives. Ones that mount externally connect to the computer through either the serial port or...