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Calabasas Today
By the People, for the People
Microsoft Sued Over OneDrive's File-Sync Tech
IDrive Inc. alleges OneDrive infringes 3 of its cloud backup patents.
Feb. 19, 2026 at 12:47am
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IDrive Inc. has filed a federal lawsuit against Microsoft Corp., alleging that the OneDrive cloud storage service infringes three of IDrive's patents covering its IDrivesync cloud backup technology. The lawsuit claims OneDrive's cloud infrastructure and desktop/mobile apps for Windows, macOS, iOS, and Android violate the patented technology for syncing files by detecting, compressing, and transmitting only changed data blocks.
Why it matters
This lawsuit highlights the competitive landscape in the cloud storage and backup market, where major tech companies like Microsoft are facing patent infringement claims from smaller rivals over core file-syncing technologies. The outcome could impact the future development and features of OneDrive as well as the broader cloud storage industry.
The details
According to the lawsuit filed in the U.S. District Court for the Central District of California, OneDrive infringes three IDrive patents (U.S. Patent Nos. 8,620,957, 8,099,520, and 8,224,920) that cover an operating system shell-based cloud storage system. This technology allows files to appear as a local folder on a user's device and sync by only transmitting changed data blocks, rather than the full file.
- The lawsuit was filed on February 13, 2026.
The players
Microsoft Corp.
A multinational technology company that develops and sells software, consumer electronics, personal computers, and related services, including the OneDrive cloud storage service.
IDrive Inc.
A Calabasas, California-based company that provides cloud backup and storage services, and holds the patents it alleges Microsoft's OneDrive infringes.
What’s next
The court will need to determine if Microsoft's OneDrive technology does in fact infringe on IDrive's patented file-syncing methods. The outcome could lead to licensing agreements, product changes, or other remedies.
The takeaway
This case underscores the importance of protecting intellectual property in the rapidly evolving cloud storage industry, where syncing technologies are critical to user experience and product differentiation.
