To upload data to Impero Backdrop it needs to be in CSV format. You can save any spreadsheet as a CSV. 

Mac 

With Macs you need to Export to a CSV file. This can be found under File in the menu bar. 

 

 

You can tell if it is in the correct format if the ending is .csv 

 

Windows 

For Windows, you can save it as a CSV file. Select this option from the File Format drop-down.