Windows 8's built-in search function is pretty good at finding individual files and all the other files that share the same name. However, it does not do a good job of clearly flagging identical files ...
The storage you are losing without even noticing.
So, it recently came to my attention that Dropbox for Android, when syncing files, automatically renames all photos and videos to a datetime stamp, not preserving the original filenames as they exist ...
It occurs to me, after doing a file-type search on one of my hard drives, that after several years of upgrades, backs-ups, re-installs, new hard drives, etc., I have collected multiple copies of many ...