I have a work book which is used for data (no formulas). 2000 rows and 135 columns. I move it from my home to office on a thumb drive. Today it is taking is over 2 minutes to open when on the hard drive. On the thumb it opens normally. Any ideas?

This hard drive was recently reformatted with a complete reinstall of windows xp pro. The version of excel is 2003.

Any help would be appreciated.