With Extended Warranty you can boost your coverage up to five years. Under QNAP “Advanced Replacement” service, you can request a replacement NAS before sending the original in, and have it shipped within 72 hours, keeping your downtime to a minimum. With “Advanced Replacement + On-site Support”, in addition to having access to our “Advanced Replacement Service”, our expert tech support professionals will be at your disposal, coming to you within one business day of your request, to ensure that your NAS is functioning optimally.