The other person said to never connect to wifi, but I'd say either put it on an isolated wifi (guest network) and lock it down to LAN-only access in your router, if at all possible.
The reason being that these devices are aggressive about getting a wifi signal, and even if they can't connect to yours, they'll apparently search for unprotected wifi networks and connect to those to send data and phone home. Locking it down to LAN only prevents this, and isolating to a guest network means no information about other devices on your network.
It's utterly insane we have to do this stuff. If you're willing to spend more, there are commercial signage displays you can buy that are essentially dumb TVs, and that is pretty much the only way to get a dumb TV today (and obviously, don't expect smart features from it).
You can use ntfsfix on the drive to do a check and remove dirty bit. This isn’t a full check though, and could mask or hide actual issues with the drive if it’s failing.
There’s also chkntfs which is more robust but I’m not sure if that’s open source and I’m not familiar with it.
Using ntfsfix is a good quick fix in my experience, but at the end of the day, NTFS is a Microsoft exclusive format and shared disks should be mounted in a format that both OSes can use, like exFAT, or Btrfs with the WinBtrfs driver (the latter I’m not familiar with, I’ve always used exFAT for shared disks, but I don’t use Windows anymore).