Convenient working two-pane file manager for android?

Question

Android

I tried several advertised file managers for android and they all turned out to be crafts.
For example, it is not clear how to see how much space files in a directory take up. Some very childish glitches. For example, in Total Commander, when copying, the keyboard does not come out. How to copy the current directory to the clipboard, the author also apparently did not think.
In general, who uses what file manager? Or are they all inedible?
And it would be better if it was free (yes, I'm such a bastard)

Answer 1

https://play.google.com/store/apps/details?id=com....

Answer 2

In older versions of android, the concept of a file is being actively eradicated. So the good old folders die off. I love headlights and midnight. But on the phone, this approach is not usable.
And few write specifically for Chromebooks.
Norton was imprisoned under the keyboard. In android, external keyboards are screwed through one place. In practice, figs catch scan codes on the fly.