Cob Cobian Backup was a free , donation-supported backup software for Microsoft Windows , written by Luis Cobian of Umeå University , Delphi . Cobian Backup was a free , donation-supported backup software for Microsoft Windows . It is written in Delphi by Luis Cobian of Umeå University . Cobian Backup was a free , written backup software for Microsoft Windows and is supported by Luis Cobian of Umeå University in Delphi .