If you've created a personal health record you'll lose access to any information you've stored there if you close your MyHealth.Alberta.ca account. You can save a copy of this information by creating and downloading a PDF report.
To create the PDF, go to your personal health record, click "PHR Tools & Settings", then click on "Tools". The first widget on the page is "Download My Health Information".
Select what information and in what format you want the information in the report and click "Create Report".