The USB error called “please insert device” normally occurs with portable hard drives. There can be a number of issues however the most common is that the drive has been damaged and will either need to be formatted or thrown away. Very rarely is it anything else.
You can also check your USB ports as the USB port errors are very common. Search this website for USB port errors. This can be either a physically damaged USB port or that your computer normally a Dell or a computer using a Gigabyte motherboard where the drives will only run out of the rear USB ports on the computer. Why this occurs I am not certain.