Optical Sizing

You have a set of files that totals 7 gigabytes of information. Which optical formats can store these files on a single optical platter? Choose two.



C) Blu-ray

D) Secure Digital


The answers: A) DVD-ROM and C) Blu-ray

The DVD-ROM format can store 8.5 gigabytes in dual-layer mode, and Blu-ray can store up to 50 gigabytes in dual-layer mode. CD-ROMs max out around 700 megabytes, and Secure Digital (SD) is a flash memory format.

Want to know more? Watch “Storage Devices.”

Storage technology has changed dramatically through the years, from floppy disks through solid state drives. In this video, you’ll learn about the technology behind floppy drives, hard drives, solid state technologies, and optical drives. You’ll also learn about removable storage technologies, tape drives, and external storage options.