? Box Sync API

Hi,

I would like to nightly sync one Box folder to my network storage place (one direction only: Box->my storage place). After sync, I would like to delete all the contents under this Box folder. Any suggetions how to do this?Box Sync API? Box Sync software? or Maybe I write my own downloading and deleting codes?

Another the related question: When the files/folder are deleted, are they immediatley permanently wiped off from Box? If not, are there any APIs to force the deletion is a immediate permanent action?

Thanks,

Joy