I explored the problem more deeply. Luis seems to have been right. There is no difference between manual and scheduled backups. When I tried to upload 2 big files manually I observed the same problem as with scheduled backup - first file uploads successfully, second one fails. If I upload small files they all uploads successfully. I attached the pieces from vsftpd.log file which maybe could help to identify problem.
Statistics: Posted by vlk — 17 Nov 2021, 12:05