You are downloading the File Locker XAP file v126.96.36.199 for Windows Phone. File Locker is a free and useful Productivity app: If you are concerned with data confidentiality and want to prevent data loss; with File Locker, your data is impenetrable and accessible to you ... You can now download the offline XAP file to install & try it.
Download Locations for File Locker 188.8.131.52 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 File Locker XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.