OneDrive is Microsoft's cloud storage service, deeply integrated into the Microsoft 365 ecosystem alongside Word, Excel, PowerPoint, and Teams. For custom web application development, OneDrive integration through the Microsoft Graph API is essential when building tools for organizations that run on Microsoft infrastructure. The API allows developers to read, write, and manage files stored in a user's OneDrive or a SharePoint document library. This is particularly valuable for enterprise applications where employees already store their work in OneDrive and expect new tools to connect to their existing file structure rather than requiring them to upload documents to yet another platform.
From Zero to Standard
OneDrive launched in August 2007 under the name Windows Live SkyDrive. The service was part of Microsoft's broader Windows Live initiative, which aimed to provide free online services to compete with Google's rapidly growing suite of web applications. Microsoft offered a generous 25 GB of free storage at launch. The product was renamed to OneDrive in January 2014 after British Sky Broadcasting (now Sky) won a trademark dispute in European courts, arguing that the SkyDrive name infringed on their Sky brand. The rebrand to OneDrive was completed globally within weeks.
The Technical Edge
When OneDrive was still called SkyDrive, Microsoft initially offered 25 GB of free storage, which was dramatically more than any competitor at the time. However, in 2012, Microsoft quietly reduced the free tier to 7 GB for new users. Then in 2015, Microsoft announced it would cut the free tier further to 5 GB and eliminate unlimited storage for Office 365 subscribers, blaming a small number of users who were storing more than 75 TB each on the platform. The backlash was so severe that Microsoft created a special opt-in page where existing users could keep their 15 GB of free storage, but only if they found and clicked the link before a deadline.
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