The key is to put in place data loss prevention (DLP) technology to block or track the movement of data. Data thieves can move massive numbers of files through any number of cloud services. You also need to protect against insider threats as well as external actors. Data loss is often a human resource problem. If your employees are not happy, they will justify stealing from the organization as an acceptable action against the culture of the organization. You can easily set up web filters to block file-sharing websites or specific anonymizer locations.”]
Source: https://www.csoonline.com/article/3527270/how-to-set-up-your-network-to-prevent-data-loss.html