It retains the data after power down.
Removable magneitic media allows you to remove the meduim from the computer, file it somewhere away from the computer, and retrieve the data it stores at will.
the magnetic storage devices, use magnetic property of the materials to save data in bits.
Nope. Flash drives don't use magnetic storage.
Magnetic
A zip disc is a storage device similar to a floppy. The media is pricey, though, so i would suggest you use CD-R/W instead of zip.
A floppy disc use a magnetic pattern to store data, and loudspeakers are usually based around a (strong) magnet. The magnet can upset the magnetic pattern, making the data unreadable.
Of these only CD-ROMs use LASERs to access the data. The others are magnetic storage devices.
Some good recommendations for good backup disc storage would be to use a DVD-RAM. It works like a floppy or hard disk, which makes it very convenient. It also has very good error checking and long lasting life.
Magnetic tape backup of your data is done with a magnetic tape data storage system. You can use digital recording to store your digital data on the magnetic tape as a backup.
Nobody made up something better yet.
Floppy disks use magnetic disk to store the data.
Um, your question doesn;t make much sense.. Secondary storage in normally considered your computers hard drive, a flash drive, floppy disc and the like. Things that don't lose data when turned off. Primary storage (like system memory)is accessed directly by your CPU, secondary storage is normally accessed through some soft or I/O device.
this is a backup method typically used in server/client enviroments. at the peak of usage, it was far more expensive to buy a new hard drive for backup purposes, and would take multiple floppy disks to backup a network (Not to mention a ton of time) Magnetic tape storage offers relatively quick back up speed.