I have set maximum upload size to 2100 M and maximum file upload size 2048 M

Where and how did you do it (files and code)?

I have done it in .htaccess file .

in .htaccess file

Apache server restart is required.

You may want to do it for PHP.

Restarting PHP-FPM service is also required after changes.

I am on a Shared Hosting . How can I do it ? If not possible , please suggest other ways . Also check in my Demo Account

Username : amitdas

Password : amitdas

No ideas.

If you have web-panel, use it.

Ask your hosting support.