Copier hard drives don't show up on the network and they have firmware
First problem is in order to clear a copier hard drive you have to remove it from the machine. The hard drive is not accessable via the network. Many copiers have numerious hard drives not just one. Some have as many as 5 and they can be very hard to find them. But the main problem is unlike computers the copiers contain the firmware or special partitioning that is not available to the public. If you clear the drive you also clear this information and the copier won't work.