SD cards are in normal operation mode, besides of one card failure after one month (some factory defect I suppose), everything is fine. We will see when do the

SD cards are in normal operation mode, besides of one card failure after one month (some factory defect I suppose), everything is fine. We will see when do the life cycle of cards expire, a year is behind us. I tested power-off events many times - there were no issues at all. At last, keycard failure won't be a crucial issue, there is a parallel intercom connected with reception - our front-desk manager can open the door wirelessly.