If you are not a very high tech-savvy user, this technique is useful for you.

Situation 1. If you have important documents and files on the hard drive of your home computer than by turning this home computer into a web server, you will be able to access all these files anywhere in world by internet connected machine including your mobile phone.
Situation 2. Say you have some personal photographs (private moments) that you want to share with the other friends and family members somewhere else in world.
Situation 3. Host your website in seconds without spending a single penny on web hosting services. Host your website on your home computer, it’s easy.
If any one of above reasons is your, here is the way how you can setup you own web server in less than 2 minutes – no need of technical knowledge.
Step 1. Go to labs.opera.com, download the Opera Unite Software and install it. Congratulations, you are running your own web server on your home computer.
Step 2. Configure local files and folders that you want to share with other person over the internet in world.
Here's an illustrated screenshot of the configuration panel - nothing technical here again.
Sharing
Step 1. Open the Opera Web Browser ( yes, that’s also web server now)
Step 2. Enable the Opera Unite Services from the lower left corner.
Step 3. Double click the file sharing link and select the folder whose content you want to share over internet anywhere in world.
All the files and folder inside this folder can now be accessed over the internet but by private sharing password.
Learn more about the Opera Unite by this video
Other Stuff are also available for the three reasons (above Situation). For instance, both PurpleNova and Dekoh Dekstop are used for share content on internet directly from the hard drive without having any upload.
Note : your computer must be in running state and also connected to the Internet for others to downloads files and web pages. Since Opera Unite streams content directly from you machine- it doesn’t upload or caches anything to its own servers.
pic - form google and video form youtube official Opera Unite insturction.