Setup in Bubble Plugin Editor:
1- Install the plugin
2- Place a button and run action "Export Data to File"
3- Provide action fields.

Data Source: this should the data source you want to export. it should be in the following format:

Dakota Rice,Oud-Turnhout,Niger,$36,738
Minerva Hooper,Sinaai-Waas,Curaçao,$23,789
Sage Rodriguez,Baileux,Netherlands,$56,142
Philip Chaney,Overland Park,Korea South,$38,735

Header: This is the first row of the file to be exported and it should be in the following format:
Name,City,Country,Salary

File Name(optional): Provide a file name