XAML/DriveSpace.xaml

<Window
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:lvc="clr-namespace:LiveCharts.Wpf;assembly=LiveCharts.Wpf"
    WindowStyle="None"
    ResizeMode="NoResize"
    Background="Transparent"
    Height="400"
    Width="400"
>
    <Grid Margin="10">
        <Border BorderBrush="#333333" BorderThickness="1" Background="#333333"
                CornerRadius="10" VerticalAlignment="Stretch"
                HorizontalAlignment="Stretch">
            <Grid Margin="10">

                <Grid.RowDefinitions>
                    <RowDefinition />
                    <RowDefinition Height="Auto" />
                </Grid.RowDefinitions>

                <TextBlock DataContext="{Binding CurrentValue}" Text="{Binding Drive}" Foreground="#28bf37" FontFamily="Consolas" FontSize="30" HorizontalAlignment="Center"/>
                <lvc:Gauge DataContext="{Binding CurrentValue}" Margin="5" From="0" To="{Binding Total}" Value="{Binding Used}" FromColor="#28bf37" ToColor="#28bf37" Foreground="#28bf37">
                    <lvc:Gauge.GaugeActiveFill>
                        <SolidColorBrush Color="#28bf37"/>
                    </lvc:Gauge.GaugeActiveFill>
                </lvc:Gauge>

            </Grid>
        </Border>
    </Grid>
</Window>