Select a cell and press the Ctrl + V hotkey to paste to it.
You can also right-click within the cells and select Copy. Press Ctrl + C to copy the selected sheet area. Hold the left mouse button and drag the cursor over the cell range to select it. For more advanced pasting, Excel offers multiple options such as Values, Formulas, Keep source formatting width, and several more. Excel includes Copy and Paste options in its menus. You can copy a range of cells in one sheet and paste them into a new spreadsheet file.
The good old copy (Ctrl + C) and Paste (Ctrl + V) hotkeys might be all you need to combine Excel files.
Copy and Paste Cell Ranges From Multiple Spreadsheets
