I am assuming you are using windows
1. Open my computer or windows explorer
2. double click on the c: drive
3. a new window should open ,or the folder pane display will change,
4. You should see a list of folders eg c:\windows
5. Right click anywhere in the blank space in the folder panel.
6. a mini menu will appear.
7 choose new then folder
8 a entry will appear in the folder panel with a flashing I bar (insert bar)
9 enter the name unisa. press enter key
10 you have not created the c:\unisa portion of the folder structure
11 double click on unisa folder
12 repeat steps 5-8
13 type in cos511, press enter key
Good luck