I use Store mode and it is the fastest. Moreover I don't have a problem about raring the files, I have a serious problem about unraring. No computer in the world unrar a 9 GB file in 4 hours in normal conditions. It is not about the method, it is about our RDP system. It is Awesome RDP, you know really "awesome". You can't believe in your eyes but look at the photo in my previous post.
X-(
I only tried to help you mate thinking that you may not use store method and that's why it is getting so much time for you to get rar files. I am really sorry about your problem
Good luck and hope you get a solution soon.