Check out example codes for "how to link html pages in different folders". It will help you in understanding the concepts better.

Code Example 1

<!-- Below this comment is a same folder link -->
<a href="yourfile.html"> same folder</a>
<!-- Below this comment is a link with a parrent folder -->
<a href="../yourfile.html">parrent folder</a>
<!-- Below this comment is a link that you can put the folder directory in -->
<a href="subdir/thefile.html">sub-directory</a>

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