> For the complete documentation index, see [llms.txt](https://sync.wiki.mksdtech.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sync.wiki.mksdtech.com/reference/files-and-locations.md).

# Files and locations

Where Rhino Sync keeps settings, local copies, sign-in data, logs and program files.

{% tabs %}
{% tab title="Windows" %}

| What                      | Location                                                                                                         |
| ------------------------- | ---------------------------------------------------------------------------------------------------------------- |
| Settings                  | `%AppData%\Rhino.Sync\settings.json`                                                                             |
| Local copies              | `%LocalAppData%\Rhino.Sync\Cache\`                                                                               |
| Cloud storage sign-in     | `%LocalAppData%\Rhino.Sync\google.link`, `microsoft.link` and `dropbox.link`, encrypted for your Windows account |
| Debug log                 | `%LocalAppData%\Rhino.Sync\Logs\debug_log.log`                                                                   |
| Program files (installer) | `C:\ProgramData\Rhino.Sync\App\8\` for Rhino 8 and `App\9\` for Rhino 9                                          |
| {% endtab %}              |                                                                                                                  |

{% tab title="macOS" %}

| What                  | Location                                                                                    |
| --------------------- | ------------------------------------------------------------------------------------------- |
| Settings              | `~/Library/Application Support/Rhino.Sync/settings.json`                                    |
| Local copies          | `~/Library/Caches/Rhino.Sync/`                                                              |
| Cloud storage sign-in | macOS Keychain, service `Rhino.Sync`, one item each for `google`, `microsoft` and `dropbox` |
| Program files         | Rhino Package Manager packages folder                                                       |
| {% endtab %}          |                                                                                             |
| {% endtabs %}         |                                                                                             |

## Local copies

When you collaborate, Rhino Sync gives the model its own folder under the local copies folder, named with a random ID, and copies the central file into it. The copy is named after the central file, the same ID and your user name, such as `Riverside Tower_3f2a…_Hana.3dm`. Embedded textures and a central file downloaded from Google Drive, OneDrive or Dropbox go in the same folder.

Rhino Sync deletes the whole folder when you end collaboration. Each Rhino gets its own folder, so two models or two Rhino instances never share one.

{% hint style="warning" %}
Don't open or edit files in the local copies folder yourself. Use **Collaborate**.
{% endhint %}

## Debug log

On Windows, Rhino Sync always writes technical messages to `debug_log.log`. When the file passes 5 MB, it's renamed with a date and a new one starts. The 3 newest old logs are kept.

Send this file with your support request.

## Next to a network central file

Rhino Sync creates a `_collab` folder next to a central file on a network drive. See [Network Drive](/collaboration/collaborate/collaboration-storage/network-drive.md#the-collab-folder).