The "soul" refers to the life of a person. AT: "you will die tonight" or "I will take your life from you tonight" (See: [[rc://en/ta/man/translate/figs-euphemism]] and [[rc://en/ta/man/translate/figs-activepassive]])
"who will own what you have stored up?" or "who will have what you prepared?" God uses a question to make the man realize that he would no longer possess those things. AT: "the things that you have prepared will belong to someone else!" (See: [[rc://en/ta/man/translate/figs-rquestion]])
The meaning is that this person has not been concerned with the things that are important to God, or that God will reward. AT: "in the view of God" or "in relation to God"