Make that data storage. Comes in two types: writeable and non-writeable.
Huh?
Ok, consider this - you bought a program that came on a CD-ROM. this is
non-writeable storage. It was written to at the software publishers factory.
Done, can't add or change anything on the CD.
Writeable storage are: Hard drives, Floppies, Tapes, Flash, and Re-Writeable CD/DVDs.
So you have a large choice of devices to save your data to. Most are reliable
for a long period of time.
The most non volatile is the CD/DVD. I have some CD's that were created in 1993,
they are still readable, the programs are next to useless but I can copy them to
a hard drive and they run.
The most common device is the Hard Drive. Hard drives continue to increase in
capacity and speed. My first hard drive was 5 meg, it took me almost six months
to fill it up.
Next most common is the Floppy drive, the floppy is almost (not quite) obsolete
because the Flash memory drive is taking its place. As a matter of fact some
manufactures are not installing floppy drives in new systems, you get a CD/DVD
rom drive to install software from, if you want a floppy drive you have to
purchase it separately and normally it is a USB device.
CD/DVD Rom Drives, these devices have increased in capacity since they were
introduced and will continue to increase in capacity as the technology evolves.
You can get a read only drive or you can get a read/write drive and make your
own CD/DVD's.
Coming up fast is the Flash memory device, also know as pen drives, flash
drives, etc. These are very compact and high capacity devices. Very convenient
(in a way a security risk) they have a chip that allows the data written to ram
and be retained with out power.
Tape devices are still around, although they are not as popular as flash
devices, they offer long term high capacity storage. Tapes are good for about
four years, the company I worked for had a requirement to retain tapes for 11
years, I had to check those tapes every year, if a tape is not stored properly
it will degrade.
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