Digital Storage Digital Storage Ann Ware ~ warea@bkps.k12.ar.us.

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Digital Storage Digital Storage Ann Ware ~ warea@bkps.k12.ar.us

Measuring Memory and Storage Digital Storage Measuring Memory and Storage Term Abbreviation Approximate Memory Size Kilobyte KB or K =1000 bytes (actual size is 1024 bytes) Megabyte MB =1 million bytes Gigabyte GB =1 billion bytes Terabyte TB =1 trillion bytes Ann Ware ~ warea@bkps.k12.ar.us

Magnetic Flash Optical Methods of Storage Digital Storage Ann Ware ~ warea@bkps.k12.ar.us

Magnetic Storage Storage device that encodes data as microscopic magnetized needles on the disk's surface The hard disk is the most common magnetic storage device

Flash Storage A type of constantly-powered memory that can be erased and reprogrammed in a single action or “flash.” Described as “solid-state” memory because there are no mechanical (moving) parts. Also known as a pen drive, thumb drive, jump drive. Storage cards for digital cameras use flash memory.

Optical Storage Storage device that records data by burning microscopic holes in the surface of the disk with a laser Compact disks Digital video disks Blu-ray disks

Digital Storage Compact Disk CD-ROM: stores information permanently; cannot be changed; typical media used for software ; 650MB capacity CD-R: recordable; can record multiple times but cannot be erased or overwritten; 650-700 MB capacity CD-RW: rewritable; can store, erase, and replace data information like a floppy disk or hard drive; 700 MB capacity is typical. Ann Ware ~ warea@bkps.k12.ar.us

Digital Storage Digital Video Disk DVD-ROM—typical storage capacity 17GB; permanent storage DVD-R, DVD+R, DVD±R—recordable, can record multiple times but cannot be erased or overwritten; 4.7 GB capacity DVD-RW, DVD+RW, DVD±RW—can store, erase, and replace data information like a floppy disk or hard drive; 4.7 GB capacity is typical. Ann Ware ~ warea@bkps.k12.ar.us

Digital Storage Blu-ray Disk High capacity optical disk that has a storage capacity of 25GB. Has recordable and rewritable disks just like CDs and DVDs. How Blu-ray Discs Work Ann Ware ~ warea@bkps.k12.ar.us