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Select Refresh data when opening the file. In the PivotTable Options dialog box, select the Data tab, and do the following: On the PivotTable Analyze tab, in the PivotTable group, select Options. If your spreadsheet contains a pivot table, you can reduce the file size by not saving the pivot table source data cache with the file and instead having the data cache refresh when you open the spreadsheet. This option removes the cropped picture data, but note that you won't be able to restore it. If this option is selected the changes you make here will only affect the selected picture. To compress all the pictures in the file, clear Apply only to this picture. Under Compression options, do the following: On the Picture Format tab, in the Adjust group, select Compress Pictures. The Picture Format tab appears on the ribbon. In most cases, you won't need the resolution to be higher than that. In the Default resolution list, select a resolution of 150ppi or lower. Make sure that Do not compress images in file is not selected. Note that if you discard the editing data, you won't be able to restore the image. This option removes stored data that's used to restore the image to its original state after it's been edited.
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Under Image Size and Quality, do the following: To print your worksheet, press CTRL+P to open the Print dialog box, and then click OK. In the Scale to Fit group, in the Width box, select 1 page, and in the Height box, select Automatic. Removing unused data will reduce your file size. Follow these steps: Click the Page Layout tab on the ribbon. The more data points you have in your workbook, the larger your file size will be. If you have worksheets with data that you're not using-and that don't contain any formulas you're using-delete them from the spreadsheet. In the Save as type list, select Excel Binary Workbook (*.xlsb). If you want to keep the default to Excel Workbook (.xlsx) but save the current file as binary, select the option in the Save As dialog box:
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This option sets binary format as the default. Under Save workbooks, in the Save files in this format list, select Excel Binary Workbook. However, for most purposes, the binary format is sufficient and saves to a smaller file. The default format is XML based, which is important if you're using your data with third-party programs because XML is an open standard.
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You can reduce your file size by saving your spreadsheet as a binary workbook (.xslb) instead of the default format (.xslx). Save your spreadsheet in binary (.xslb) format
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