Hi,
Just sharing some observation.
Plugged USB stick 16GB, works great, saving images, recognized after soft power-down, all ok, but,
after blackout (during standby - soft power down) usb still plugged in but after boot usb did not recognized.
After reboot without usb stick, plugging again usb all ok. Tested two times - unplugging from power in stand by mode.
Like scope didn't like being unplugged from power with usb plugged in.