The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From Yesup Ecommerce Solutions Inc:
This is an official app for Fileserving members. With this app, you can easily store your files online and access them anywhere. You can instantly open your documents, pictures, videos or music files directly on your mobile device. Feature: - Access files anywhere through an encrypted connection - File Manager: copy, move, remove file easily - Download files to local folder for offline access - Bookmarks the frequently used files or folders - Record and save photos or videos instantly - Create share links and send them to your friends - Sort your files by name, data, etc