Hi ElsV,
Welcome to Microsoft Q&A forum. I'm happy to help.
Thank you for taking the time to report this. I completely understand how frustrating it is when File Explorer keeps re‑selecting the entire filename while you're trying to make small edits, especially when you're renaming many files throughout the day.
Based on what you've described, this behavior typically occurs when renaming files that are synced via OneDrive or SharePoint. In these scenarios, File Explorer may momentarily refresh as the sync client updates file states, which can cause the rename box to lose focus and re‑highlight the entire name.
You may try this workaround:
- Wait a short time before you start typing.
- In File Explore > select ••• > View > Options > navigate to View tab > scroll down to the item Use Sharing Wizard (Recommended) > uncheck it > select Apply.
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Given these limitations, the most appropriate avenue for product changes or feature requests is to contact Microsoft Support or Send feedback to Microsoft with the Feedback Hub app.
We are sorry for any inconvenience may have caused and thank you for your sympathy.