This is the name of a place. Translator may add a footnote that says, "The name 'Perez Uzzah' means 'the punishment of Uzzah.'" (See: [[rc://en/ta/man/translate/translate-names]])
# to this day
This means to the time when this was being written, not to the present time in the twenty-first century.
David uses this question to emphasize that he is afraid to take the ark to Jerusalem. AT: "I am too afraid to bring the ark of Yahweh with me to Jerusalem." (See: [[rc://en/ta/man/translate/figs-rquestion]])