You are downloading the Momento XAP file v18.104.22.168 for Windows Phone. Momento is a free and useful Photo & Video app: "Windows Phone 8 photo editor that lets you memorialize special events, milestones or any other moment in your life captured by the ... You can now download the offline XAP file to install & try it.
Download Locations for Momento 22.214.171.124 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 Momento XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.