VU Solo 4K - not reading USB as expected

D Lee

Been trying to flash a Solo 4K for ages. Foematted stick FAT32, loaded image in correct dir structure - as I understand it - /vuplus/solo4K/.... still no luck..
It says updating firmware, press power button, which I do but it keeps looping.
This error has recurred with a number of different flash images.

I used a 8GB usb stick. 16GB wouldn't work at all.
Has anyone else had a similar problem?
Or any ideas of how I can get over this issue as it has.

Thx in advance ...