Western Digital said it had restored My Cloud services, more than a month after the data storage chip maker disclosed a cyber security incident.
Western Digital said it is progressing through the restoration process and majority of the impacted systems and services were operational.
Western Digital expects customer access to its online store to be normalized in the week of May 15.
The unauthorized party obtained customer names, telephone numbers and partial credit card numbers from its systems, Western Digital said in a statement.
The company said it would communicate directly with impacted customers and was investigating the validity of the data.
Western Digital said its factories were operational throughout the incident and the company is shipping products.
Western Digital did not reveal the likely impact on its revenues in the wake of the cyber attack on its IT systems.
