As I get older, I become nostalgic and often recall things from the past. I recently started writing a diary. I didn’t have the habit of writing a diary when I was young. Now I think about it, I should have started writing a diary a long time ago. It will be interesting to read it when I’m old. It will be meaningful to show it to my relatives when I die. A few days ago, when I was sorting out photos on my phone, I saw a diary written by my wife herself. She said that she likes to spend money and likes to buy expensive things. It’s interesting. I always thought she didn’t recognize her own shortcomings. Several things that happened recently made me understand the importance of data backup. The network disk is completely unreliable. You must have more than two hard drives. Save the data and photos. This WordPress data must be backed up from time to time.