Hi Vishnu
IMHO, you don't need to mark every single response to your threads as a helpful answer. It is better that you just mark the responses that really helped you in your particular issue. Doing so will also help others who encounter the same issue in the future and come across your thread to zoom in on the really useful responses. Marking everything as helpful (especially when they are not) will confuse others in the future, plus it might encourage others to just simply reply to your threads with irrelevant answers in hopes of getting answers. You will end up wasting your time and effort in going through all these answers which might be of no use to you. If you want to appreciate someone for taking time to answer your query, but the response was not relevant to it, you can just hit the Like button.
As for the above response, I can't figure out how that would be helpful in your case as the provided link has nothing to do with SFTP at all.
Rgds
Eng Swee