Regarding Sacred Tradition:
One must consider the Gospel according to St. John 20:30 and 31:
Many other signs therefore did Jesus in the presence of the disciples, which are not written in this book: but these are written, that ye may believe that Jesus is the Christ, the Son of God; and that believing ye may have life in his name.
St John himself tells us that the written word does not cover it all and there is more to the story. That more is beyond Sola Scriptura and what is rightly called the Holy Tradition of the Church.