You are downloading the Sharit APPX file v220.127.116.11 for Windows Phone. Sharit is a free and useful Social app: Sharit makes it easier to post updates to multiple social accounts and networks at just one step. You can add unlimited number of accounts for each ... You can now download the offline APPX file to install & try it.
Download Locations for Sharit 18.104.22.168 APPX file
Note: To install it manually from an SD card, you should choose one of the server location above to get the offline Sharit APPX file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.