Visit https://www.joomlatools.eu/docman-14.html and download Docman v1.4.0. There is a more modern version of Docman that is commercial. We're using the free version in this tutorial.

Login to the administrator area of your Joomla site and go to Extensions >> Plugin Manager. Click to enable the "System - Legacy" plugin.

Go to Extensions >> Install/Uninstall and click "Browse" to upload Docman

Go to Components >> Docman >> Categories and click "New" in the top-right corner.

Give your new category a name and click "Save" in the top-right corner.

Click "Files" and then "Upload" in the top-right corner.

Normally you'll want to keep this option as it is and just click "Next>>>"

Browse to find your file and then click "Submit"

Once you have uploaded your file, the next step is to create a "Document" out of it. That simply means giving it a name, description and other details. Click "Make a new document entry using this file."

Make sure that both "Approved" and "Published" are set to "Yes". Then click "Save".

Hopefully your new document will appear as above.

Go to Menus >> Main Menu >> click on "New" >> choose "Docman". Choose a title for your menu link and click "Save".

Click "Preview" in the top-right corner and you'll see your new menu link. Click on it and you'll see your Docman category. Open the category to see your file

Docman also has a very powerful permissions system that allows you to control who can and cannot access documents. Start by going to Components >> Docman >> Groups

Click "Add" in the top-right corner". You can create a group of users simply by moving them from the "users available" list to the "Members in this Group" list.

Now when you open up any document you can click "Permissions" and give access only to a certain group of users.