Re: Sync files from Server to Local every 6 hours.
For scripting in general:
https://winscp.net/eng/docs/guide_automation
For scheduling:
https://winscp.net/eng/docs/guide_schedule
You possibly do not want to sync files:
https://winscp.net/eng/docs/faq_delete_synchronized_files
For the 6hours constraint:
https://winscp.net/eng/docs/file_mask#size_time
https://winscp.net/eng/docs/guide_automation
For scheduling:
https://winscp.net/eng/docs/guide_schedule
You possibly do not want to sync files:
https://winscp.net/eng/docs/faq_delete_synchronized_files
For the 6hours constraint:
https://winscp.net/eng/docs/file_mask#size_time