The first way would be long press the app icon then drag and hold the icon over-the-counter trash can on your home screen, wait 2 seconds and drop the app in the trash - it can now be uninstalled.
For example, you'll save your files wherever you want to - it is actually up for you. https://Goelancer.com/question/waxing-uncomfortable-strategies-to-frequently-asked-questions-3/