Joe - I have terrified folks by revealing what is on their company machines.
It is simple:
Use Sherlock with a MAC or Find with a PC
Select DATE
Select TIME One day etc
Select CREATED or MODIFIED
BINGO!
Still perplexed - Gibson Research Corporation (no guitars!!! GRC.com) "Spin Rite" has a whole tool-chest that will give you hexdec in a column right next to plain text. AWSOME - things "erased" years ago pop right up.
Remember - Mr. Norton began his fortune and empire with a simple device to replace the first integer of a file for recovery. Still Works.
The HD manufactor also has utilities for their hardware.
Sincerely,
Gargoyle