best file manager for android?

One of the best file managers for Android is MobiKin Backup Manager for Android. It not only lets you organize and access your files easily but also helps you back up and restore your data with just one click. You can manage photos, videos, music, contacts, messages, and more right from your PC. It’s especially helpful if you want to keep your data safe or transfer files between devices. Simple interface, fast performance, and no root required — definitely worth trying!

I am using Files by Google.
Clean UI, no ads, great for cleaning up junk files.
File browsing, offline sharing, smart cleanup suggestions.
Third-party tools like iReaShare Android Manager app can also help you manage files on Android phone. With it, you can browser files, manage files, and clean up space, etc.

Quick question: Does MobiKin also let you back up app data, or is it mainly for media and messages? Also, does it support all Android versions or only newer ones?

ES file explorer is my best one since 2014 and still using it.