Login to the administrator. Locate the Media folder. This is where you upload your files to and you may create new directories.
After completing the upload, the file code is shown in the code area. Copy the code.
Open your article where you want to place the link. You then want to switch to html view. Paste your copied code here. Where it is written, >Insert your text here< , >Type your link text here<, between the ><.
Click the update or save button. You should now be back in the WYSIWYG editor, Save your article and wala! You are done.