And the difference between Cai Yun and traditional hard disk.

Hecaiyun is different from the traditional hard disk: Hecaiyun belongs to the network disk of cloud server, which has the advantages of flexible expansion, data backup, high reliability, flexible charging and cost saving. Although it is stored in the cloud, it needs to be connected to the network all the time to use it. So you can't use it anytime and anywhere, you need to connect to the network to use it. The advantage of traditional hard disk is that it is cheap, but it also has some shortcomings such as weak storage capacity, slow backup and troublesome expansion.