You are downloading the Phish Alpha XAP file v0.23.1.2 for Windows Phone. Phish Alpha is a paid and useful Music app: Sonos ... You can now download the offline XAP file to install & try it.
Download Locations for Phish Alpha 0.23.1.2 XAP file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline XAP File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Phish Alpha XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.