You are downloading the Sahara Lite XAP file v18.104.22.168 for Windows Phone. Sahara Lite is a free and useful Social app: The Sarahah website describes the app pretty simply: “Sarahah helps you in discovering your strengths and areas for improvement by receiving honest ... You can now download the offline XAP file to install & try it.
Download Locations for Sahara Lite 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 Sahara Lite XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.