Sometimes, you’re unable to save a list that contains a lot of data as a template.
Below, I’ll show you step–step how to save a template with 16,000 list items.
1. Go to List Information and click on Save list as template:
2. Type File name, template name, and
template description then check Include
Content check box and click OK
button.
3. Your site will generate an error message
as shown below:
4. Go to Central Admin and navigate to Central
Administration, then click Application
Management, Web Applications,
and then select General Settings:
5. Change the Maximum Upload Size default setting to 1024MB then click OK.
6. Save list as template again.