Unable to connect to PC from phone. What to do?

Question

Android

There is a wifi router, a phone and a laptop are connected via wifi. The laptop has a shared folder. The current profile is domain (network discovery and shared folders and printers are enabled). In "Computer Management" -> "Local Users" -> "Users" there is a user with a name and password. The program built into the phone's file manager was used to connect. However, the phone does not want to connect in any way, I tried it with and without a domain, I looked at the ip address of the laptop through ipconfig, entered it directly into the program, still no result. The program on the phone could not detect available PCs for connection (two options: manual entry and search). What is the problem? The interface of the program is as follows:

spoiler

Answer 1

I connect to a computer on win10 from the phone through the "file manager" program. Android 9. From a phone with Android 4, everything is exactly the same - but I can not connect.

Answer 2

There could be many reasons for this. Firewall on windows, incorrectly shared folder, internal Netbios protocol settings, simply not a working program on the phone.