What is the fundamental reason underlying the difference between both civil and criminal cases that can be filed in federal court and those that can be filed in state courts?

state courts deal with only original trials and federal courts deal with only appellate issues.
federal courts deal with issues granted to them by the u. s. constitution and state courts deal with issues granted to them by the constitution.
federal courts are the courts of last resort and state courts are trial courts with limited jurisdiction.
state courts deal with issues of state law and federal courts deal with issues granted to them by the u. s. constitution.