Copy cell content beatween sheets.

Hello guys,situation this morning for me terrible,probably my brain stopped at the moment,i need help.

I want to copy cells content from the sheet1 column A to sheet2,I was tried by the function Sum but problem is some of cells which i tried copy have combination letters and numbers as content.

Maybe, specific things is because i wont copy cell A2 sheet1 to cell A2 sheet2.

Thank you in advance.