Why is Realtek Wireless Manager Service using almost 7 gigs of space?

[D N5]

Trying to do some hard drive clean up, and I see that in Program Data -> Realtek, the wifidevmanager_sub.log file is 6.8 GB. I tried opening the file, but it's too large for notepad, and won't open in word. I have a wifi card on my PC, however nothing is connecting to it. My PC is hard wired into the router. Why is this log file so large? Can I delete it? If I disable the service, will it break my computer?Thank youD

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