From Friday, April 19th (11:00 PM CDT) through Saturday, April 20th (2:00 PM CDT), 2024, ni.com will undergo system upgrades that may result in temporary service interruption.
We appreciate your patience as we improve our online experience.
It's because those files have different delimiters.
Original one has "space" as delimiter - and Read Measurement File Express VI does not have such a setting.
The second, "copy" file, has "tabulator" as delimiter - that's why you can read all the data.
You can also read data via function "Read Delimited File" (or "Read Spreadsheet File"), where you can setup delimiter. But then you need to add more parsing to it, to get signal data.