Windows Desktop App: Files, Data, Chat

I need a full-featured Windows desktop application that blends three core capabilities in one seamless interface: • File management – a clean explorer-style module that lets users browse, search, copy, move, rename, and organise local files and folders quickly... (Budget: min $100000 USD, Jobs: .NET, C# Programming, C++ Programming, Data Analysis, Python, Software Development, Windows Desktop, WPF)