Hi @Oren_Tanay and welcome.
Thanks for the positive comment, I’m glad you managed to get something out of it.
As I mentioned in the tutorial, I don’t develop locally and so I have no experience to fall back on in order to answer your question. However, in my limited-experience I don’t believe Windows and Unix talk to each other very well when it comes to file permissions. So, I wouldn’t expect something like WinFSP, Drive Mounting (or similar) to work as the permissions would probably break the files.
Because running a Linux Web Server in a VirtualBox is almost exactly the same as interacting with any “actual” server… Can you not just setup your FTP/PhpStorm to interact with your files over FTP? That’s the way I’d do it, if I worked locally. And so long as Ubuntu on the VirtualBox has a connection to the web, then there’s no reason why you can’t initiate git and sync it to your Repo like you would in a real-world environment.
Someone who might be able to contribute is @PawelP. I know he’s spent a lot of time working with VirtualBox since I made the tutorial. Hopefully, he can weigh in and shed some light on how he does it. Plus as it seems you’re a PhpStorm user, you may be able to compare notes on some things that he’s been struggling with too (Developing with PhpStorm).