> For the complete documentation index, see [llms.txt](https://help.sbtinstruments.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.sbtinstruments.com/software/file-formats/gmi-file.md).

# GMI file

💾 Typical file size **1–8 GiB**

💽 Media type `application/vnd.sbt.gmi+zip`

💻 Typical software [Access](/software/access/access.md)

{% content-ref url="/pages/jEityVc2n5EnhnYbkhSR" %}
[Backup & restore](/software/access/pages/backup-and-restore.md)
{% endcontent-ref %}

{% hint style="danger" %}

### Only for backup & restore

The structure and content of the GMI file may change without any notice. Don't rely on the GMI for measurement data or the like.
{% endhint %}

## File name

Usually, the file name is something like `backup-of-bb2241039-2026-01-09.gmi` that includes both the ID if your device (`bb2241039`) and the current date (`2026-01-09`).


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