# SD card

Many rusEFI units have on-board microSD card slot.

## Validation without vehicle power

* Windows 10 or Windows 11 is required, Windows 7 is not supported for Mass Storage Device.
* Ignition OFF or ECU not even hooked to vehicle
* USB Drive expected:

![image](https://github.com/user-attachments/assets/3f164970-b014-437c-a4cd-25ab2aed31ad)

* In TS, two green icons are expected

![image](https://github.com/user-attachments/assets/156df2db-3777-414f-91be-b52521932ea3)