Ok, so I have written above: WinSCP cannot synchronize between two remote sessions.
This request is being tracked here:
Issue 365 – Different remote sessions in both panels

Hi,
sorry for my late reply.
I'm connecting using FTP protocol.
Regards
MM

How are you connecting to the NAS? Using FTP/SFTP/other protocol? WinSCP cannot synchronize between two remote sessions.

Hi,
I'm using WinSCP scripts regularly, it's great prg.
I'm trying without success to mirroring two folders (not mapped) from two NAS.
I found a workaround, I temporarily map one folder.
Is it possible to mirror them without mapping them?
Thanks & regards
MM