The space between the active cell and the lower corner of the datasheet is not large enough to accommodate all of the data ...

The space between the active cell and the lower corner of the datasheet is not large enough to accommodate all of the data you want to import. What do you want to do?* To import as much of the data as will fit in the available space, click OK.* To cancel the import operation, click Cancel. You can then specify a smaller range of data to import or select a cell nearer the upper-left corner of the datasheet and try importing again.