The copy command will need to have the exact file name in it. For instance here is the way it would be for the latest firmware. console#copy t10.65.10.1/N3000_N2000v6.3.1.8.stk backup Can you test saving the running config to the server? console#copy running-config tftp://10.65.10.1/myconfig.txt With the USB drive first check to be sure it is seen by the switch.  console#show usb device Once the USB drive is seen by the switch, then issue the copy command.  console#copy usb://N3000_N2000v6.3.1.8.stk backup 
Trying to update firmware on Dell N3024 switch. Syntax is correct but when it executes the transfer I get the transfer failed error. Also tried by USB port and get the USB not detected error. Is the USB port on the switch disabled by default? If so how do you enable ? Have also tried 5 different USB thumb drives to the same result.
Unable to tftp on Dell N3024