Algorithm for syncing multiple folders on one PC?

Question

Python

We have:
Two different folders on the same PC - domost, folder A:

C:../Desktop/Files

and folder B:

D:/DeskFiles

Task:
Write a program that would constantly run as a background process and synchronize both folders with any changes in any of them.
Cases:

1. Deleted a file from folder A - it was automatically deleted from folder B and vice versa.

2. Added a file to folder A - it was duplicated in folder B and vice versa

Moreover, all this should consume a minimum of PC resources (there are no restrictions on synchronization time).
So far, only comparing hash sums at intervals in a cycle comes to mind, but I'm not sure about the adequacy of this method - I practically didn’t work with hashes.
PS: maybe there are some libraries for this?

Answer 1

https://msdn.microsoft.com/en-us/library/windows/d...
or use the inotify ports.

Answer 2

I found a curious lib for python - dirsync . Haven't checked yet, tomorrow I'll pick it up.