The easy way to do it would be through the Pineapples own web-interface. On the right side under USB, you can see the content of /etc/config/fstab Factory-settings / (SD-Card mounted at /sd): config 'mount' option target '/sd' option device '/dev/sdcard/sd1' option fstype 'auto' option options 'rw,sync' option enabled '1'   Edit to mount the USB memory stick instead (You need to take the sd-card out): config 'mount'