Data can be destroyed in an attempt to cover up a crime or to cover traces when someone does not want you to follow the digital footprint. People can attempt to destroy the physical drives by deleting the data and physically damaging the drives by dropping them, burning them, putting them in water, or exposing them to magnets.
Data recovery involves many different methods to recover data from a drive. Data recovery methods can recover deleted data from drives as well as recover data from drives that have been damaged. Data can be recovered from many different drives, including computer hard drives, usb keys, cell phones, and even copy machines.