Automate Send/Receive files to SFTP with encrpytion

If you do not have prior experience of completing similar to the requirements below please do not bid. Please give some detail of similar experience in your bid description. Milestone 1: Automate transfer of files to/from an SFTP site a) A script/task is to be created that will move files located in a folder on a file server to an SFTP site. The routine is to poll a folder at a set frequency (either recurring every x minutes, or at a set time each day) to check for new files. When new file(s) are identified the files will be moved to a folder on the SFTP site. The script will be running on a Windows Server 2012 R2 machine, the file server location will be a UNC path. b) The reverse of (a) is required. A script will poll a folder on an SFTP site at a set frequency, on a new file being identified the file will be moved from the SFTP site to a folder on a file server (UNC path). The above tasks may have multiple instances, so that files can be moved from different locations/SFTP sites if required. Ideally using free software such as Filezilla, putty etc Milestone 2: File transfer with encryption /decryption Similar to Milestone 1, but files need to be encrypted before sending to the SFTP using a PGP key. Files being received from the SFTP need to be decrypted after being moved to the Windows Server. Further details will be provided for this milestone to the successful freelancer. You will not be given access to the server or be given the SFTP details, so instructions will be required on how we implement, add the actual UNC paths/SFTP details and execute the script.