How to name it?

hi all,
The reason why writting this mail--i don't know how to name a tool written by myself :-)
Following is the functionality of a file system tool :
When you install the tool it acts as a protection for your files.Tool copies the address of files.
If you accidently deleted a file -if its contents are not modified-then the tool retrives the contents of file.
How should i call this tool./
Saying file recovery is somewhat miss leading-(i got critisied for saying it's recovery tool)--because it doesnt recover files deleted before it's intallation of tool.
It's can't be backup tool - since the tool backup only address of file and not the file itself.
Is their any other similar tool is out there?