As far as I'm aware it's self replacement.

It should be 4GB+ otherwise will not work

On 11 June 2016 at 19:26, Élodie de FranceServ Hébergement <admin@franceserv.fr> wrote:
Hello,

The SanDisk USB (4GB) provided with the RIPE Atlas probe don’t work anymore since more 5 days and the connection logs say “NO USB”. To check the USB stick, I plugged a personal one and since this time the probe is working again. I have this probe number 18685 since 2015-03-05.

I would like know if the team could send me a new USB stick to replace the old one please or if I need to buy a new one myself ?

Best regards,
Élodie