![](/images/new-backgrounds/1185399/185399123x1.webp)
3.Press the USB button on the projector remote control. The PC Free screen appears.
4.Do the following as necessary to locate your files:
•To display files inside a subfolder on your device, press the arrow buttons to highlight the folder and press the Enter button.
•To move back up a folder level on your device, highlight Back to Top and press Enter.
•To view additional files in a folder, highlight Next page or Previous page and press Enter.
5.Press the arrow buttons to select one of the following certificate files:
•To register a Client Certificate or a Web Server Certificate, select the certificate file icon, press Enter, select Client Certificate or Web Server Certificate from the displayed menu, and press Enter again.
• To register a CA Certificate, select the CA certificate file icon and press Enter.
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