When this happens to a plain old USB external drive, the usual suggestion is to take out the drive, and connect directly to a desktop computer. If it works, then the USB chip in the external enclosure was the cause of the fault.
In this case, this is not a solution. Moreover, I had the impresson that this media box has it's own internal operating system, probably a small Linux. So let's assume for now, that it's not a hardware error (but you can try another USB cable in the meantime, and if you have another computer, try with that... in case it's the laptop's USB connector).
Here are some options:
- Reset to Factory Default. See Chapter 7.3.4 (Page 38).
- If that doesn't help, then a Firmware Update, if it's available. Chapter 7.3.2., Page 37