You are downloading the Sharit Extension XAP file v1.0.0.0 for Windows Phone. Sharit Extension is a free Social App: This is an extension to integrate your Sharit app into the "Me" tile. Using this extension you will be able to use Sharit to post updates and. You can now download the offline XAP package file to install & try it.
Download Locations for Sharit Extension 1.0.0.0 XAP file
Package File
Please Click Here > to retrieve available package files for Sharit Extension.
Please be aware that the Sharit Extension XAP file you are to download is hosted on the Microsoft Store CDN server. You can read more about Sharit Extension or get it on Microsoft Store.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Sharit Extension XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.