Cannot download backup.
%plesk_dir%\PrivateTemp folder is full.
Large delay before download start is caused by large backup file: when Download icon is pressed in Plesk, Plesk Backup Manager gathers all the backup files into a single archive file and copies it to
%plesk_dir%\PrivateTemp folder. After that download notification appears in web-browser.
The customer might have pressed Download icon several times while waiting for download notification.
Wait up to 15 minutes before the download starts.
Keep free space for
Do not press Download icon again and again while waiting for download notification.