(Backup is another pronoun of security. Redundant backup has undergone many changes in the field. It can be backed up on the memory card of the mobile phone or to the local PC. The current trend is network backup. Compared with the previous two methods, the security and convenience of network backup are undoubtedly the highest, but security and privacy issues seem to have become a major topic. Today, I want to talk about two types of network backup that I am familiar with: myphone and)