Changed to MSC mode and the device is still not found on my computer.
Have you tried different USB ports on your computer, or possibly a different computer? The back ports generally work better than the convenient front ones, as they are closer to the motherboard and put out more power.
By the way . . . you can simply stick to and reply in your original thread, rather than starting a new one for each question. As it’s all related to the same ‘topic’, it’s less confusing for everyone that way. Just hit the ‘Reply’ button, instead of the ‘New Message’ one.