Once an Excel file is added to the Test Studio project. you can bind multiple tests to use the data in it - one test can be bound to one data source at a time. The Excel file can be added in multiple projects by following the same steps listed above for each project.
Please, keep in mind that the Excel file you are adding to the Test Studio project is being copied in the Data sub-folder and is being used from this location. That said, if you need to apply any changes in the file, you need to modify these in the file from that project location.
I hope that this information will be helpful for you. In case you need further details, please, get back to me.
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