You are downloading the Sunshine XAP file v1.0.0.0 for Windows Phone. Sunshine is a free Business App: App Sunshine calculates the time of sunrise and sunset, length of day. To define a spot press button Current point or tap. You can now download the offline XAP package file to install & try it.
Download Locations for Sunshine 1.0.0.0 XAP file
Package File
Please Click Here > to retrieve available package files for Sunshine.
Please be aware that the Sunshine XAP file you are to download is hosted on the Microsoft Store CDN server. You can read more about Sunshine or get it on Microsoft Store.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Sunshine XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.