Which arduino board do I have?

Hi! I've done a programme with an Arduino Uno board. I have another board and I want to transfer the programme to it. The problem is that I do not know which model this board is. I've tried several options but the transfer does not work. How can I identify the board model? Thank you

Have you considered that we cannot see the board you want to identify? Can you take an image of the mystery unit and post the image so that others can, possibly, figure out the what's got you bugging?

Usually it is written on the top or bottom of the board.

You could go on the Arduino website, look for a listing of the Arduino boards and match yours to one shown on their photo.