Find the DOS batch file below. Place it in startup folder under start menu. backup will happen whenever you log in to the system. Otherwise run it yourself manually.
or
echo of xcopy C:\POSTALPOS_BO D:\POSTALPOS_BO_backup /h/i/c/k/e/r/y
Copy above two lines and the same may be pasted in new notepad. The same should be saved with extension of .bat file.