You are downloading the Notification Sounds XAP file v18.104.22.168 for Windows Phone. Notification Sounds is a free and useful Music app: Turn your mobile into a fun machine! Download Notification Sounds app with sms sounds and notification ringtones and enjoy these cool ... You can now download the offline XAP file to install & try it.
Download Locations for Notification Sounds 22.214.171.124 XAP file
Note: To install it manually from an SD card, you should choose one of the server location above to get the offline Notification Sounds XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.