A March cyberattack
https://www.bleepingcomputer.com/news/security/hackers-leak-images-to-taunt-western-digitals-cyberattack-response/
The ALPHV ransomware operation, aka BlackCat, has published screenshots of internal emails and video conferences stolen from Western Digital, indicating they likely had continued access to the company's systems even as the company responded to the breach.
The leak comes after the threat actor warned Western Digital on April 17th that they would hurt them until they "cannot stand anymore" if a ransom was not paid.