Follow the steps below to open an existing workbook in Microsoft Excel 2010.
Step 1:-Once you click the File Menu on the top left corner you will find option of open in the file menu. This will open two columns on the right. The first column for recent workbooks will show the list of recently opened workbooks while the third column of recent places showing the locations that you visited last.
Step 2:- Once you click the Open in the menu, a dialogue box will open asking you to browse the file and specify its location in the drive. The dialog box is shown below.
Step (3) Once you browse the file correctly and locate it, the desired Microsoft Excel file will open as shown in the screenshot below.