Which of the following is NOT a method for restricting processing of personal data according to GDPR?

The correct answer is related to the concept of data processing restrictions under the General Data Protection Regulation (GDPR). Article 18 of the GDPR establishes the right to restriction of processing, which allows individuals to request the limitation of their personal data processing under certain circumstances.

When considering the methods for restricting processing, it's essential to focus on practical and compliant actions. Noting the restriction in the system and moving data to a separate system are actions that allow organizations to maintain accurate records about the data's status while still enabling some level of regulatory compliance. Temporarily blocking a website could be a method to restrict access to data linked with that site, making it a compliance-friendly approach.

Disabling the data management system, however, is not a standard or compliant method for restricting processing. It would effectively halt all operations concerning personal data, likely leading to operational disruptions and compliance issues. Restricting processing should still allow for some level of controlled access or management of the data to align with GDPR requirements. Thus, disabling the data management system does not align with the principles of effective data handling as prescribed by GDPR.