Re: Sync files with only newer modified date than target's.
WinSCP does that by default.
You have probably configured "mirror files" mode. Switch back to "synchronize files" mode:
https://winscp.net/eng/docs/task_synchronize_full#mode
You have probably configured "mirror files" mode. Switch back to "synchronize files" mode:
https://winscp.net/eng/docs/task_synchronize_full#mode