storage

storage

1. hdd

   • harddrives are expensive
   • contains most files
   • have moving poarts
   • non volitile
   • primary storage

2. rom

   • read only mempory
   • non volatile
   • stores instructions foir boot up

3. ram

   • volitile
   • data is stored on it for quick accessses
   • read and write memory

4. storage capacity

   • bits
   • bytes
   • kilobytes
   • megabites
   • gigabytes
   • trea bytes

5. floppy disks

   • most popuilar in the 1970s
   • holds very small amounts of data
   • transfer data to another comouter

6. optical

   • uses a small laser to read
   • multimedia aplications
   • cd - rom
     • read only
     • non volitile
     • cd - rw can be re written
   • dvd
     • -rom is read only
     • - r recordable
     • -rw re writtable

7. magnetic tape

   • backing up files
   • the are small and robust
   • low cost
   • slow to write to

8. memory cards

   • can hold large amounta of data
   • robust and portable
   • durable no mvinhg parts
   • need an adapyer to be read