Inefficient OneDrive Synchronization Causes Windows Explorer Slowdowns

Thank you for the response. I think it's important to rule out a few possibilities that do not apply in my case:

1. When I pause OneDrive synchronization, Windows Explorer immediately returns to normal behavior, which strongly suggests that the issue is directly related to the synchronization process.
2. The problem is not related to folders containing thousands of files or to file size. The slowdown occurs when a single file is updated, regardless of whether it is small or large. In the past, only the file being synchronized would remain temporarily locked. Today, however, I notice that the entire Windows Explorer is affected, becoming slow or unresponsive for several seconds—and sometimes even minutes—until synchronization is complete.
3. Approximately 80% of my OneDrive content already uses Files On-Demand on Windows 11.
4. Build folders, cache folders, and development-related temporary files are kept outside of OneDrive, specifically to avoid this type of impact.
5. I have already run onedrive.exe /reset multiple times throughout 2025 and 2026, with no noticeable improvement.

For these reasons, my impression is that this is not a local configuration issue, but rather a limitation, regression, or inefficiency in the synchronization engine itself and/or in the integration between OneDrive and Windows Explorer.

What I would really like to understand is whether Microsoft officially acknowledges this behavior and whether there are any plans for optimization or a fix. Similar reports have been raised by users for years, yet there appears to be no clear resolution or public update on the matter.