[ubuntu] Any? 7zip GUI for Ultra Compress Files

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http://ubuntuforums.org – Hello Ubuntu Community, As the tittle says, I would like to know any GUI to compress a whole directory which is around the 12 gb, thats why I need the ultra mode and I know 7zip is top in this situation. Currently I'm using Ark, but it doesn't give any options to "tell the program" that I want ultra compression mode and make it use more ram (same as windows gui) and all the cores. I wouln't want to mess with the terminal, since it is a little complicated the folder is located in a mounted partition which is ntfs and well it is a mess. Been looking in google, it gives me nothing b (Hardware)