No. The PST file is your data file. The NK2 files is your autocompletion
cache.

--
Russ Valentine
"Irish" wrote in message
...
I plan to move data from XP OL2003 to Win7x64 OL2007.

I have found an Office Data File on the XP at ...\Microsoft\Office named
Outlook.NK2 that is 788 KB in size. There is no file in the folder with
the
extension .pst. There are .xrs .xml outcmd.dat and OutLPrnt files in the
folder.

When I search C:\ including hidden files for any .pst file the result
points
to the same location and name but now the size is 87,313 KB. Is/are these
the
same file?