A setup file is a computer file that helps you to install and prepare a software program or application on your device. It contains all the necessary instructions and resources required for the installation process. Full definition
It will copy setup files, install features, install updates if any, and finally clean up the residual installation files. (thewindowsclub.com)
Essentially although the links take you to different download pages, all these finally download the same web setup file! (thewindowsclub.com)
You can install them again via setup files whenever you feel like through file manager or store them in computer or laptop and transfer them back when required. (xolo.in)