I've been using Arduino UNO for quite sometime and brought a new Arduino Nano. When I connected it to my computer, the power usb lit up and the blink sketch started running ( as expected of course).
Now I opened up the IDE and switched boards. But when I try to upload code to my Nano I get an error-
avrdude: ser_open(): can't open device "\.\COM3": The system cannot find the file specified.
Clearly the IDE can't see my board. Uploading to my UNO goes fine. The serial port option is greyed out so I can't change it.
I have searched extensively online for a solution and have found none. This must be either a very unique issue or a very simple one.