Go to Admin > Account (under Account Settings) > click on the Export button on this page, to receive the data. The export of the entire helpdesk data, in XML format, will be sent to your registered agent email address of this account. 

Kindly note that an Account Administrator is one who would be able to access the accounts tab which would allow one to export account information, access billing, or buy day passes.  

Note: Based on the volume of data, it may take several minutes to export and send it to your mailbox. Do reach out to Freshdesk support (support@freshdesk.com) if it takes longer than expected.