Recover Hard drive software by Recovery Mechanic allows to undelete files, repair damaged corrupted and inaccessible disks partitions, recover deleted files and lost folders, undelete lost and corrupted email databases. http://recoverymechanic.com/
CompTIA A+ Exam Cram: Hard Disk Drives are nonvolatile (meaning they don’t lose data when power off) devices that store data, generally 3.5”. visit us at http://www.asmed.com/comptia-a/ for more info .
Floppy disk drives have mostly disappeared now, though floppy disks themselves still exist. They have a way of nestling in disorganized places like closets, dusty but probably functional if you happen to have an 'ancient' computer. If not, they're also perfect for upcycling.