My External Needs Help

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I purchased a Western Digital My Book Pro external hard drive in August. In the past month I've been getting some fairly common errors when trying to download things onto the drive, and occasionally when I reboot that blue screen scan disc shows up for it. I let it run once and the drive worked fine for a bit but now its messed up again so I don't think running the scan disk again will be very helpful.

Should I contact WD or is this just something I can fix with some diagnostic program? If the latter, can someone please recommend something? Thanks.