# GMI file

💾 Typical file size **1–8 GiB**

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

💻 Typical software [Access](https://help.sbtinstruments.com/encyclopedia/software/access)

{% content-ref url="../access/pages/backup-and-restore" %}
[backup-and-restore](https://help.sbtinstruments.com/encyclopedia/software/access/pages/backup-and-restore)
{% 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`).