OneDrive for Business (Plan 1) is a cloud-based storage solution offered by Microsoft that provides users with 1 TB of personal storage space accessible from anywhere. It allows for syncing of files across multiple devices, easy sharing and collaboration with internal and external users, advanced security features such as ransomware detection and recovery, version history tracking, and integration with Microsoft Office applications. Admin controls allow for managing user access and settings, monitoring usage, and controlling external sharing. Plan 2 offers additional features such as Data Loss Prevention and Customer Lockbox. Overall, OneDrive for Business (Plan 1) is an excellent choice for individuals and small businesses looking for a reliable and easy-to-use cloud storage solution.