This question already has an answer here:
I want to transfer files from my Ubuntu (installed on VirtualBox Version 5.1.26) to Windows 7 host. I'm able to copy files from my host to guest using Shared Clipboard but I want to copy the other way round. I already installed Guest Additions as mentioned in How to copy & paste from Ubuntu VirtualBox guest to Windows host?
I've been through many other posts on the Internet but none worked for me. I can use WinScp or Putty or any other file transfer applications but that's not what I want, I don't want to use any alternative file sharing software for this.