CoWork Storage is a cloud storage service from NTT East, built for small and medium businesses looking to replace local file servers. The desktop app works like Windows Explorer, so teams can manage cloud files with familiar drag-and-drop without learning new tools.

Ransomware protection is included at no extra cost: it spots suspicious file changes, stops them from spreading, and lets administrators restore files with one click. All development, operations, and support stay within Japan, and data is stored in domestic data centers. The service also connects with Microsoft 365 for co-editing Office files, office printers for scanning directly to cloud folders, and kintone for workflow links. A free trial is available.

Active Directory integration lets organizations use their existing Windows login system for centralized user management and single sign-on.

The service holds both ISO/IEC 27001 and ISO/IEC 27017 certifications, meeting international standards for information security and cloud-specific protections.