What do you mean lost?
Have you tried searching for it via a Terminal?
At a Terminal prompt try typing:
find / -name filename
If you only know part of the name type:
find / -name filena*
The says to treat the following character not as a litteral but as a speacial character. The * is a wild card, so it will accept any string that starts with filena. You can also dp the same thing at the start of the string.
fins / -name *ilename
You'll get a lot of "Permssion denied" returns at first (there's also a way to "prune" these but that's a bit more complicated). Anyways, if the file is anywhere on that hard drive the find command will find it .
