Wipe all hard drives before disposing of them

Most people know to wipe data off their computers’ hard drive before disposing of them but know to do so with other devices that have hard drives.  Consider copy machines and fax machines, these devices have hard drives that could contain sensitive information. 

Printers and fax machines must have their hard drives completely wiped clean before being disposed of. These machines often keep copies of the last documents they printed or faxed in their memory. If you do not wipe their memory before disposing of them, you may put sensitive or confidential data at risk. Simply deleting the hard drive is not always enough because remnants of the data may be left behind. There are recycling companies that specialize in the destruction of data on these types of machines before breaking the machines down.

Reference:                          
Media Handling and Data Disposal Best Practices