I installed WattOS on a 2 GB USB drive (Jetflash) and tried to mount a 4 GB
Maxell USB drive (with PCMan File Manager) but it failed.
I tried to install Nautilus (sudo aptitude install Nautilus in the terminal)
but it failed. Then I installed Thunar file manager (sudo aptitude install
thunar). I will experiment with it. It is fast and could mount the other drives.