What type of data can be saved to an external disk using the /store command?

The /store command in MikroTik allows for the saving of specific types of data to an external disk, and among the given options, web-proxy data is the type that can be saved effectively using this command. Web-proxy, which deals with caching, filtering, and managing web traffic, generates significant amounts of data that can be stored externally for logging, reporting, or analysis purposes. Utilizing an external disk for this data is advantageous for maintaining system performance and managing disk space effectively.

In contrast, while other types of data, such as system configuration and user-manager data, are crucial for operation and management of the router, they typically are not handled through the /store command for external storage in the same manner as web-proxy data. Dude data, which relates to network monitoring and management, also doesn't directly correlate with the specific functionality of the /store command. Therefore, web-proxy data stands out as the only correct option available based on the functionality of the /store command.