# Override Files
Suppose a file already exists in a SharePoint folder and the user attempts to migrate the same file using the Attach2Dynamics UI, real-time or through bulk migration. In that case, the outcome will depend on the **"Override file"** configuration. If this setting is checked, the existing file will be overwritten. If unchecked, a new file version will be added with a version number.
## Configuration
### Unchecked
By default, the "**Override file**" setting is unchecked, as indicated in the screenshot.
In this scenario, if a file already exists in a SharePoint folder and a user attempts to migrate a file with the same name (or the same file, or two files with the same name simultaneously) using either real-time or the Attach2Dynamics UI:
* **Real-time**
* **Attach2Dynamics UI**
On SharePoint, a new file with a version number gets appended.
### Checked
If the user enables the "Override files" setting for migration when encountering files with the same name in a SharePoint folder, the following occurs:
* **Real-time**
* **Attach2Dynamics UI**
This setting ensures that the latest version of the file is always migrated and replaces any existing file with the same name in SharePoint.
{% hint style="info" %}
**Note:** This is across both the Attach2Dynamics UI, bulk migrations, and real-time migrations.
{% endhint %}
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