Could you please suggest me some free software or the procedure to reduce the size of storage capacity of files? For example scanning documents or photos usually have bigger size, how to make it smaller without not much pronounced adverse effect on resolution?
Thanks...

save it as jpeg quality ard. 65%

You can always use photoshop when scanning and save it in lower file size.
Or if you don't have photoshop, I would recommend using GOOGLE PICASA to reduce file size of photos - it is very easy and reduces very efficiently.

winzip or winrar

sajhabahadur

If for images try the software in the following link. Its safe, fast and easy.

http://www.vso-software.fr/products/image_resizer/

Look for a software called Irfan View, it will let you resize all files, either by % or by ratio. It installs in minutes and has minimal footprint. Resizing is under one of the advanced options.

If you are talking about reducing the size of picture.. Just open the picture on Paint and SaveAs in different location.

Go to>Start> Run>

Then type: Reduce x y%

where x is the path of the file.

and, y is the percentage you want to reduce the size by.

Enjoy!