A DVD Disk holds around 4.7GB, which is, even more space than a CD or Floppy Disk. But CD Drives cannot read DVD Disks. I ll leave that up to you. DVD is still new for computers and there are different types and different formats for DVD Rewritable types. Some Day DVD will probably be a standard feature because the disks can hold so much more data than Cd s or Floppy Disks.
Most new computers come with at least two USB ports today for connecting scanners and cams.