how to increase storage in local disk (c)

Do you have any other drives?

Have you installed any program on other drives?

Are you using SSD or HDD hard disk?

You may open start and search for cleanup and open Disk Cleanup

You cannot increase storage without deleting anything. The easiest way is to use "Disk Cleanup" which will only remove files that are not necessary for your system, so you would not lose any of the important files.

You could also compress your files, but it has its own drawback and you need more experience with Windows to decide what folder to compress.

The last solution would be buying a larger hard disk, and migrate your files to the large drive.

i don't want to delete any folder . but i want increase my storage of local disk (c) which is 97 gb

If u want to extend c: drive, follow my steps

1. open your d: drive
2. select all files in your d drive and paste it to ur e: drive or any external drive
3. Then u will see unallocated Space after c i.e here
4. then right click c: drive and select extend volume
5. then follow the onscreen steps click yes and
6. Right-click on the partition that you want to extend, and choose "Extend Volume" to continue.
7. Set and add more size to your target partition and click "Next" to continue. 
8. Click "Finish" to complete the process.

Use this free Program to see what is taking up the space.

https://www.jam-software.com/treesize_free/

Here is how to understand Treesize Screenshots:

http://www.jam-software.com/treesize_free/screenshots.shtml

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Also check to see how much space System Restore is using:

https://www.sevenforums.com/tutorials/335-system-protection-change-disk-space-usage.html

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Tips to free up drive space on your PC > Applies to: Windows 7/Windows 8.1

https://support.microsoft.com/en-in/help/17421/windows-free-up-drive-space

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You can clean up your Hard Drive using these two methods.

"Delete files using Disk Cleanup"

http://windows.microsoft.com/en-us/windows/delete-files-using-disk-cleanup#delete-files-using-disk-cleanup=windows-7

Disk Cleanup Wizard addon lets users delete outdated Windows ...

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Using the Free CCleaner Program:

http://www.piriform.com/ccleaner

Under NO condition use the Registry cleaning Option in CCleaner

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And download, install, update and scan your System with the free version of Malwarebytes AntiMalware:

http://www.malwarebytes.org/products/malwarebytes_free

And Norton Backup, if you are using Norton, can do strange things with filling up Hard Drive space.

Cheers.