You are downloading the Media Locker Pro XAP file v18.104.22.168 for Windows Phone. Media Locker Pro is a free and useful Photo & Video app: "Powerful and free way to protect your private photos and videos. It's easy to use, offers a number of optional levels of security and cleverly ... You can now download the offline XAP file to install & try it.
Download Locations for Media Locker Pro 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 Media Locker Pro XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.