$60 suggested donation, but can be any amount you wish. Drive is included in select "Naviian Dawn - Book Introduction Packages" for easily moving "Naviian Dawn" digital files between flash-drive and your iPhone and USB Type-C Android devices. This donation is freely given to help publisher and author cover the cost of the device; but it not required to keep and use the device. Add to cart and put in the dollar amount you wish to donate. Thank you.