Please Select mirror server to download this file.
In default setting, mirror server will be choose and will start to download file automaticaly(So, if you have some reason to change default setting, you don't need to select mirror site by your hand. Download will be automaticaly start).
You can select mirror server by your hand, and set to your it as default download server. And also You can stop to use automatic server selection/automatic download.
If you wish to use automaticaly select server/download (it is default setting), you should select 'Auto (Random)' and click 'Save' button.
If You wish to use selected mirror server as default server, you should select 'Pin current one' and click 'Save' button after to select download mirror server.
If you wish to select mirror server/download by your hand (stop to use automatic download), you should select 'None' and 'Save' it.