I am getting update file error when updating to 1.6, I upgraded previously ok what is wrong?

How does this compare? Ive got a Fiio 3ii as this XDuoo X3 has a similar spec, should I sell if the sound detail is the same i am not to interested in the DAC feature of the x3ii, if I sell then I can get a little money back?

Pitch is very important im an old man now but if it doesnt play at the right speed dont use the device, enjoyment goes out the window, in the old days lps used to run at 33 and a 3rd , but not always but can drop down to 33 and a human ear can hear that....