Speaking of network disk storage, this was a very popular product a few years ago. There are Dropbox, Google Drive, and Microsoft OneDrive abroad... In China, there are 360 Cloud Disk (already hung), Huawei Netdisk (already hung), UC Netdisk (already hung), Kingsoft Express (already hung), Sina Microdisk (already hung) , Thunder Express (has been suspended), Baidu Netdisk (will be suspended in the future?!)...