Open USMT2.UNC

I was transferring one(1) file to a Kingston data traveller. Clicked on the key and every file on “My Documents” got sucked up into one file. Somehow, I managed to get it downloaded to my computer. It is in the form of USMT2.UNC, USMT2.ING, and IMG00001.DAT.
Problem:
The file is 1,661, 310 KB. Windows uses “Notepad” as the default for opening the file. Notepad will cannot handle a file that size.