You are downloading the 4shared XAP file v18.104.22.168 for Windows Phone. 4shared is a free and useful Entertainment app: 4shared is like a large virtual folder for your data. You can access your files anytime you need, being sure that they are always kept safe in your ... You can now download the offline XAP file to install & try it.
Download Locations for 4shared 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 4shared XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.