You are downloading the Spotify XAP file v184.108.40.206 for Windows Phone. Spotify is a free and useful Music app: Spotify is now free on the Windows Phone. Listen to your music, wherever you are. With Spotify, you have access to a world of music. You can listen ... You can now download the offline XAP file to install & try it.
Download Locations for Spotify 220.127.116.11 XAP file
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Spotify XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.