The folder you want to create the spreadsheet in. To get the folder ID, navigate to the folder and copy the ID from the URL (the long ID after /folders/).
What is the difference between using the green input variables and the dropdown menu?
The dropdown menu is the easiest way to configure the tool step. You can select the Drive, Folder and Spreadsheet from a list of options via the dropdown menu.The input variables offer more flexibility e.g. you can use the same tool step for creating multiple spreadsheets, however you will need to manually provide the necessary Google Sheet IDs.
Can I use a mix of both dropdown menu and green input variables?
If you are using the tool in an agent, this is the recommended approach. You can use the dropdown menu to select the fields that don’t need to change, and then use the green input variables for “Title” to allow the agent to dynamically pick a name for the new sheet.