dvd or usb amount of storage for pictures
All CD, DVD's and blu-ray's are multiplexed optical data storage. This is what movies and music is on.
CD & DVD are examples of Secondary Storage Devices.
CD and DVD storage technologies are typically classified as computer data storage. They can also be referred to as external storage.
Look at the Case Logic CD-DVD 336 Capacity Classic CD-DVD wallet for $33. Also Bellagio-Italia's CD-DVD storage binder for $15. Snap-N-Store has a CD Storage Box for about $5. All available at Amazon online.
A DVD. Apex.
Tape, DVD, CD, Floppy Disk
Dvd is different kind of storage disc even though it looks same as CD. Hence cd-rw cannot write dvd,while usually dvd-r or dvd-rw will be having facility to write on a cd.
What is minimum capacity OF dvd
CD's and DVD's are not magnetic. They are optical storage devices that are read with LASER beams.
It is neither, CD DVD and hard disk is STORAGE not input or output.
zip disk drive floppy disk drive cd drive dvd drive
An Optical Disk