The backup will copy files from windows to a NAS that has a share available via rsync.
Make sure you have cygwin installed with the package rsync.
Configure the NAS
I store my script in folder %userprofile%.
#!/bin/sh rsync -aP --delete /cygdrive/d/bilder rsync://idefix@nas/Bilder
Shortcut in Windows
To get the script easily executed we create a shortcut on our desktop.
Fill as target:
C:\Windows\System32\cmd.exe /c ""C:\cygwin64\bin\sh.exe" --login -i /cygdrive/c/Users/idefix/backup.sh"
Fill as path:
If you now click the shortcut, it should open a window and directly start with the sync.