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If a <emphasis>restricted driver</emphasis> is availble for a certain device, you can install it in order to allow your device to function properly, or to add new features. For example, installing a restricted driver for certain graphics cards may allow you to use more advanced <ulink type="help" url="ghelp:desktop-effects">desktop effects</ulink>.
The blue color indicates the free space, the yellow one indicates the used space. On the right of this chart there's a small legend with the exactly free and used space.
The filesystem is a mechanism with wich files are archived and organised on a storing device such as a hard disk, and is an important part of an operating system. Without a filesystem, accessing and storing files would be impossible.
A partition is a means of dividing a phisical device, such as a hard disk, into many logical devices.
On it...