Zipped folders does not compress much

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Hi Kalyan

I am an independent advisor here to help

this actually is perfectly normal

Largely because some file types compressed better than others. So you will notice differences in the amount of space savings when zipping files or folders

The following article does a good job of explaining this in detail

http://kb.winzip.com/kb/entry/104/

Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.

My 20.8 MB folder becomes 20.4 MB when I compress and zip. Is it normal?

That depends on what kinds of file are in the folder, and what kind of compression is used.

Let's take picture files, for example. The most popular picture formats, including .jpeg and .png, are already compressed, so compressing them further won't get you very far. The same is true for popular music formats like .mp3 and popular video formats like .mp4.

You also need to take into account the extent of compression. Compressing a file is computationally intense, so the more you try to compress a file, the longer it takes to compress. Users have to choose between how much they want a file to compress and how long it will take to do the compression.

So, to answer your question - "Is it normal?" - the answer is: It depends.

Thanks James, for your prompt reply and help.