Buffalo 3-Year Trend Micro NAS Security Subscription (OP-TSVC-3Y)TheTrend Micro NAS Security 3 Year Subscription Service allows supported TeraStation models to use the internal Trend Micro NAS Security service. The NAS Security anti virus service can scan files on a scheduled basis and can even scan files in real time, protecting the data on the TeraStation from the threat of virus. The subscription service lasts for 3 years from the date it is first used, and is provided as a unique serial number which is