What is the file manager for android with offline folders locally?

Question

Android

Good evening. You need to decide the following:
On a Windows laptop there is a folder with music, 40 gig, regularly updated, and deleted.
You need to synchronize this folder with the same one on Android, preferably with an SD card
. That is, they added a new file on the laptop, it was added on the phone, deleted on the phone, it retired on a laptop
All this to work on a local network, without the Internet, I know through the Internet there are a lot of cloud drives, mostly paid

Answer 1

SMBSync2

Answer 2

Google "Synchronization over Local Area Network", there are many such applications.

Answer 3

SMBSync2