A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Actually, I think =CELL("Filename") will also include the name of the sheet the formula is on as part of the result. This will most definitely display the full filename and path:
=LEFT(CELL("Filename"),FIND("]",CELL("Filename")))
canvasAK note that if you enter an =CELL(".....") formula on a workbook that hasn't been saved to disc yet, nothing will appear in the cell. Only after saving and either refreshing the formulas or closing and reopening the book will the result show up.