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Microsoft Word on Windows is getting its biggest default-save shake-up since 2010: new documents now save straight to OneDrive with AutoSave switched on the moment you hit “New.” The change, rolling out first to Microsoft 365 Insiders and then to all current-channel users, means local “Document1.docx” files are officially history, replaced by cloud versions that sync in real time across PC, Mac, web, iOS and Android devices. Why it matters 1. Zero-click backup: OneDrive versioning protects every keystroke, so accidental deletes or ransomware attacks can be rolled back within seconds. 2. Seamless collaboration: Live co-authoring is on by default, eliminating “final-final-v4” email chains. 3. Copilot turbo-search: Microsoft’s new OneDrive-integrated AI surfaces the exact paragraph, table or image you need, even inside decades-old archives, slashing search time for enterprise users. How to keep files local • Click the new dropdown beside the filename, choose “This PC,” and toggle AutoSave off. • Set a Group Policy (for IT admins) or a registry key to force local paths company-wide. • Use the upcoming “Save As Default” option, which Microsoft says will return before general release. Privacy & bandwidth tips • Personal Microsoft accounts get 5 GB free; heavy Word users may need the 100 GB plan or Microsoft 365 Personal (1 TB) to avoid sync stops. • Offline editing still works: Word caches changes until your next connection, then merges silently. • Sensitive drafts? Mark them “Always keep on this device,” encrypt with Windows BitLocker, or create a local-only library. Release timeline • Today: Office Current Channel Preview build 2510 for Windows. • November–December 2025: Staged rollout to enterprise Current Channel tenants. • Early 2026: macOS, iPadOS and web apps adopt the same OneDrive-first default. Bottom line By eliminating the “save” reflex and binding Word to OneDrive, Microsoft is betting that friction-free cloud backup will outweigh local-storage nostalgia. For most users the move is a productivity win, but anyone drafting confidential documents should tweak settings now before Word’s next blank page lands squarely in the cloud.