Where is the file manager app on my Android phone?

To access this File Manager, open Android’s Settings app from the app drawer. Tap “Storage & USB” under the Device category. This takes you to Android’s storage manager, which helps you free up space on your Android device.

What happens if I delete file manager?

If you delete this folder it will recreate when you start using any kind of apps in your phone. So can’t remove this file permanently in your phone. If you think this folder consume lots of space from your phone it depends on your phone here are the files you’ve downloaded from within apps.