By orally denying the defendant's motion to suppress, the trial court failed to comply with G.S. 15A-977(f)’s requirement that it enter a written order with findings of fact resolving material conflicts in the evidence. The statute mandates a written order unless the trial court provides its rationale from the bench and there are no material conflicts in the evidence. Although the trial court provided its rationale from the bench, there were material conflicts in the evidence as to whether the defendant’s consent to search was voluntary. The court remanded for the trial court to make the necessary findings of fact and for reconsideration of its conclusions of law in light of those findings.