You are downloading the Contacts Backup XAP file v18.104.22.168 for Windows Phone. Contacts Backup is a free and useful Productivity app: "Contacts Backup" is the easiest and most reliable tool to backup your contacts. It reads every single detail of all of your contacts, ... You can now download the offline XAP file to install & try it.
Download Locations for Contacts Backup 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 Contacts Backup XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.