What are the responsibilities of a data custodian?

What will be an ideal response?

Data custodians work directly with data owners and are responsible for the storage, maintenance, and protection of the information. Depending on the size of the organization, the custodian may be a dedicated position, such as the CISO, or it may be an additional responsibility of a systems administrator or other technology manager. The duties of a data custodian often include overseeing data storage and backups, implementing the specific practices and procedures specified in the security policies and plans, and reporting to the data owner.