magnetic disks

magnetic disks

1. internal and external hard drives

   • can be inside a computer or used outside ( like a very large USB pen drive)
   • can hold TBs of data - equivelent of 1000MB ( 250000 MP3 songs)
   • data transfer is fast - can move 40MB a second
   • internal drives - tends to be used for storing the OS and application software
   • external drives tends to be used for backup a large amount of files

2. magnetic tape

   • data transfer is slow :usually used at night to back up business information
   • cheapest type of mangnetic disk, they are also small and light.

3. solid state drives

   • can hold TBs of data - equivelent of 100MB ( 250000 MP3 songs)
   • data transfer is very fast - moves 600MB a second
   • no moving parts - less chance of breaking
   • medium storage - can hold GBs of data. such as an OS but not MP3s