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+In this articel we will discuss about using Cosmos VFS (virtual file system).
+Cosmos VFS and the VFS manager classes, let you manage your file system.
+
+First, we should create and initialize an instance of the VFS;
+```
+var fs = new Sys.FileSystem.CosmosVFS();
+fs.Initialize();
+```
+What is done here is that the partitions and file systems list is being initialized, and the file system is being registered.
+Right after this lines is done, an message looking like this will apper on your screen:
+
+///////////////////////////////// INITIALIZE.
+
+This message is printed by the initialize method and it provide info about the file system.
+
+After our VFS has been initialized, we can use more interesting functions, lets go over some of them:
+
+1. Get available free space.
+```
+long available_space = fs.GetAvailableFreeSpace("0:/");
+Console.WriteLine("Available Free Space: " + available_space);
+```
+We use this function to get the size of the available free space in our file system, in bytes.
+You have probably noticed the "0:/" argument passed to this function, this is the id of the drive we want to get available free space of.
+Cosmos using DOS drive naming system and this is why we use "0".
+
+///////////////////////////////// FREE SPACE.
+
+2. Get file system type.
+```
+string fs_type = fs.GetFileSystemType("0:/");
+Console.WriteLine("File System Type: " + fs_type);
+```
+This will let us know what the file system type.
+
+///////////////////////////////// TYPE.
+
+3. Get files list.
+We start by getting the directory entrys list, using:
+```
+var directory_list = fs.GetDirectoryListing("0:/");
+```
+Once we have it, we can get the names of our files:
+```
+foreach (var directoryEntry in directory_list)
+{
+    Console.WriteLine(directoryEntry.mName);
+}
+```
+
+///////////////////////////////// FILES LIST.
+
+4. Read files.
+This one is more tricky,
+We need to get a directoryEntryList, find files in the list and print the content to the screen.
+
+///////////////////////////////// READ.
\ No newline at end of file