Hi,
I need help in exporting the .lsa for survey which has more than 30,000 responses as whenever i export that particular survey .lsa it tries to download .html file and even that file does not download and shows below error
 

You need to discuss this with the person responsible for your Limesurvey installation. This has most probably to do with the PHP settings on the server (e.g. max exectuion time, max vars, the memory alocated, etc.)