Full database backup I'm using third party tool for making schedule database backups. I need to make one additional full backup. Should it be affected on the scheduled backups? If yes,  is there any solution?
The short answer is yes. 

As usual, after full backup follows differential backups, that completely depend on the last full backup. It means that if the database failure occurs there will be no chance to apply scheduled differential backups because they will be with another LSN.

The solution is to use COPY_ONLY option.