external hard stored in a hard disk drives drive. Optical Disks Portable Faster than magnetic tape, but slower than Flat, circular, plastic hard disk or or glass disk on flash memory which data is stored in the form of light and dark pits. CD: Can Types: transfer data up to the speed of Compact Disk CD: About 7800 KB/s, or (CD): 650 MB about 70 minutes of CD-ROM: CD-Read audio. Only Memory - data cannot be erased from it CD-RW: these DVD: access disks can be erased rates of 600 and rewritten at any KBps to 1.3 time. MBps DVD: Ranges Digital Versatile from 4.7 GB Disk (DVD): to 17 GB Only Memory - data cannot be erased from it DVD-RW: these disks can be erased and rewritten at any time.
stored in a hard disk drive. external hard drives Optical Disks Flat, circular, plastic or glass disk on which data is stored in the form of light and dark pits. Types: Compact Disk (CD): CD-ROM: CD-Read Only Memory - data cannot be erased from it CD-RW: these disks can be erased and rewritten at any time. Digital Versatile Disk (DVD): Only Memory - data cannot be erased from it DVD-RW: these disks can be erased and rewritten at any time. Portable Faster than magnetic tape, but slower than hard disk or flash memory CD: Can transfer data up to the speed of 7800 KB/s, or about 70 minutes of audio. DVD: access rates of 600 KBps to 1.3 MBps CD: About 650 MB DVD: Ranges from 4.7 GB to 17 GB
compare_the_types_of_secondary_storage_media.docx