File.swift

if FileManager.default.fileExists(atPath: fileURL.path) {
   do {
        let data = try Data(contentsOf: fileURL)
        /// Sweetie, this is the data you need to upload as the multipart form data 
        ///  via URLSession or Alamofire, Moya, whatever Network Library you're using! 🍻
   } catch {
        print(error.localizedDescription)
   }                     
}