diff --git a/Data/simplegrid1.cross b/Data/sgrid1.cross
similarity index 100%
rename from Data/simplegrid1.cross
rename to Data/sgrid1.cross
diff --git a/Data/simplegrid2.cross b/Data/sgrid2.cross
similarity index 100%
rename from Data/simplegrid2.cross
rename to Data/sgrid2.cross
diff --git a/Data/simplegrid3.cross b/Data/sgrid3.cross
similarity index 100%
rename from Data/simplegrid3.cross
rename to Data/sgrid3.cross
diff --git a/Data/simplegrid4.cross b/Data/sgrid4.cross
similarity index 100%
rename from Data/simplegrid4.cross
rename to Data/sgrid4.cross