You are downloading the FTP Server XAP file v220.127.116.11 for Windows Phone. FTP Server is a free and useful Productivity app: FTP server to copy files over a wireless Wi-Fi connection◾Runs under lock screen (but not in background)Use UTF-8 for none English file ... You can now download the offline XAP file to install & try it.
Download Locations for FTP Server 18.104.22.168 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 FTP Server XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.