How about search your file by using 'modified date'?

"Darren" wrote:

opened a spreadsheet yesterday, input data on two sheets. Opened the same
spreadsheet today, added 6 more sheets with data. Probably saved about 20-25
times (not exaggerating). Ahhhh, finally done with data entry. Closed file,
renamed it, opened it again..WHAT!!!!!! Its the same version I started with
this morning, 2 sheets of data, the 6 I did today are gone..........searched
HD for *.xls and *filename* but nothing........what gives???