SFTP or File which is a better choice?

Hi,

If we need to pick up a file from a server there are 2 options.

1. File adapter(NFS/FTP)

2. SFTP

Which one is best and why?What added advantage/benefit do we get using SFTP adapter given that SFTP and File(FTP option) both uses User ID and Password for security.

At present we see increasing use of SFTP adapter. What is the reason behind that?

Which SFTP adapter is better Advantco/Third Party or the new SAP SFTP adapter?

Regards,

Shaibayan