Hello. I know that there is a lot of information on the Internet, but nothing helps me. The virtual machine does not see the flash drive at all, it also does not appear when creating a shared folder: 
then I type a command in windows on visualbox: net use x: \ vboxsvr \\ lol the console literally opens for 500 milliseconds and I don’t even have time to see if everything is fine there, well, after that no folder appears on the network 
Inside, too, I climbed - nothing, but I do not understand anything about usb. I insert a linux flash drive, it sees it, and in the virtual machine settings it does not exist (the screen can not do it, because it is blocked for some reason if it shows a window that there are no flash drives) What could be the problem? thank