jQuery File Upload by blueimp with Web API – 404 not found

You need to update the web.config file to allow larger content to be sent.  Here is an example of 300 MB.

<configuration>
<system.web>
<httpRuntime maxRequestLength="307200" />
</system.web>
<system.webServer>
<security>
<requestFiltering>
<requestLimits maxAllowedContentLength="314572800" />
</requestFiltering>
</security>
</system.webServer>
</configuration>