GNU/Linux is blessed with a good choice of file managers. Gnome has Nautilus, KDE has Dolphin and Konqueror and Krusader, which I wrote about some time ago). If you are looking for a minimalist system with low processor and memory overheads to revive an old "underpowered" machine or make the latest PC look even faster, you have to start thinking about alternatives. One of them is Thunar, the default browser of XFCE.