I don’t own the Samsung Galaxy Note 9, but from what I’ve heard of people so far, it exhibits the same type of problem the Samsung Galaxy Note 8 has with USB speeds and SMB speeds as well.
I’m not sure if the Samsung Galaxy Note 9 has the same trouble with the S-Pen as well. If it’s behaving weirdly, and you have a case with a magnetic clasp, take the phone out of the case and see if the issue persists. This tip helped a lot of people with earlier versions of the phone :).
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