Appending Points Data
If points data is stored in multiple files, you can import these files into the project and add them to existing points data. To do this, right-click on the object you wish to append and select Append Data. You will be prompted to select a file.
Next, the Import Tables For Appending window will be displayed.
Check the data to ensure that the correct information will be imported, then click Finish to add the new file.