With your test open in UFT, go to File > Settings. From the Test Settings window, click on Resources, and you will see the ''Data Table'' section where you can specify 'Other location' to specify an Excel spreadsheet as your Data Table file (either locally or one stored in ALM).

You can also store your Excel spreadsheet Data Table file on a network drive or folder and use the DataTable.Import method to import the shared Data Table in each script (this will overwrite the existing spreadsheet). Moreover, there is a DataTable.Export method and about a dozen other functions for the DataTable object that can be found in UFT Help:

UFT > Help > HP Unified Functional Testing Help > Object Model Reference for GUI Testing > Utility Objects > DataTable Object

Additional resource:

UFT > Help > HP Unified Functional Testing Help > UFT User Guide > UFT Panes > Data Pane > Concepts > Importing Data Tables into Tests or Components