The "Downloads" area of your User Drawer is where you can access all of the reports you have requested from the system. When these reports are ready, they will appear in your Downloads area and they will stay there indefinitely until you remove them, allowing you to always go back and revisit any reports you previously ran.
To access your Downloads, visit the User Drawer and select "Downloads."
Here, you will see a list of your downloads, with the ability to filter through them, download or export them, and delete them individually or in mass.
Keep in mind the reports will contain only the data from when they were requested. Therefore, if you want to see a report or export with updated data, you should request that report in your community again and then access the more recent version in your Downloads.