I would suggest you to read how to configure storage from this link (Login required) first and then come come with specific question/problem.
You may also search this over Google, you can find many articles about same.
Use following storage types for SQL server and file system
<Storage Type="filesystem" Id="LocalFileSystem_01" defaultFilesystem="true" defaultStorage="true"
Class="com.tridion.storage.filesystem.FSDAOFactory">
<Root Path="STORAGE_PATH" />
</Storage>
And then define the item type as per your requirement, here default is SQL server and I have override the for binary and pages to filesystem
<Item typeMapping="Page" cached="CACHE_BEHAVIOR" storageId="LocalFileSystem_01" />
<Item typeMapping="Binary" itemExtension=".EXT" cached="CACHE_BEHAVIOR" storageId="LocalFileSystem_01" />
</ItemTypes>