MEMORY
Adv and Dis of SOLID,OPTICAL,MAGNETIC
solid memory (micro chips)
solid memory is found in things like a flash drive and you can read and write data or files on them and they don't break easily as they don't have any moving pieces inside them
ADV
it doesn't brake easily
you can read and write on it (like a hard drive)
cheap to make and is getting cheaper to buy
you can get up to 128GB onto some drives
very portable
DIS
It can carry viruses
The more storage the more money it costs
OPTICAL
optical memory is a disk that is read or written on by lasers. This is why DVD and CD players have a small red laser reader inside, the disk is read by a laser because the laser reads the light reflected off the flat part and not on the little dimples
Optical memory disk magnified
Optical memory laser
Optical memory disk
DIS
Have to be read or written by a certain type of reader
slower access time and have to wait for it to load up all data stored on disk
can be scratched or broken if not cared for properly
cant be read if to scratched or damaged
ADV
Portable since they are so small
very cheap
durable and last a very long time if cared for correctly
Magnetic Memory
magnetic memory is things like floppy disks and hard disks.
they are read using a head in the disk drive
DIS
it contains moving parts which means it brakes very easily
can be wiped by magnets
can be scratched and damaged easily
reader picks up on everything from dust to finger prints covering hard disk
costs a lot to get it recovered if data is losts
ADV
portable size
cheap
holds a lot of memory