Is there a program for synchronizing files over wi-fi between Android, Windows, Linux?

Question

linux

I am looking for a program to replace the cloud with my smartphone. That is: I worked with files on one computer, synchronized this folder with a smartphone, came to another computer, synchronized it again, and it already has an agreed version of the same folder that we worked with on the first computer.
Give a tip if there is such a program. I would love to have clients for both Windows and Linux. But if this is not found in principle, 2 different systems will also work, one for Windows, the other for linux.
I tried to put Syncthing, according to the description and ideas - it’s generally a caramel, but on my Android 4.4.2 its client didn’t take off, and judging by the discussions, it’s raw dampness, with which there are only problems.

Answer 1

https://www.resilio.com/

Answer 2

Raise on smartphone ftp\sftp\nfs\smb. Is it stupid to connect it as a disk on computers and work with files directly?)