Just came across this topic today due to having the exact same issue with my Note 10+ this week and was unable to figure this out. Really strange it's working on my USB 3.1 port but not the 2.0 or 3.0 ports. Has to be a Microsoft issue with Windows but I'm on Windows 10 but I tried on my wifes Windows 10 laptop and it worked fine there but she doesn't have the version 1909 or some updates over the past month, so I wonder if MS yet again messed something recently as it seems every single little or big update has caused problems for the last several years. MS has become very incompetent and that's where I bet this issue lies, is a MS problem. To work on my wifes laptop but not my desktop makes no sense other than MS messed something up with an update(s)? So... update on my situation: I connected a USB flash drive earlier today (after posting my reply here) and later came to check on the transfer and it disconnected so nothing transferred. I plugged it in again and nothing, switching to the next USB 3.0 port and it worked but then I heard repeated sound when a device is disconnected and checked my device manager. For me, it was my Xbox Wireless Receiver that is used to let me play games with my Xbox 1 controller. That though was plugged into a 4-port USB hub so I unplugged the hub and the receiver and haven't plugged either back in. I was able to finish my transfer but when that was done I decided to try a USB 3.0 port again for my Note 10+ and now it works perfectly fine so for me it was a device (the hub or receiver) plugged in that must have become defective recently but now things work fine. Thought I'd update for future readers with a similar issue that it may be a fauly device plugged into a USB port.
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