diff --git a/.gitignore b/.gitignore
index 1f0b2078..257c017e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -128,5 +128,6 @@ dmypy.json
 # Pyre type checker
 .pyre/
 
-# exclude /data directory entirely
-/data/
+# exclude csv files from data directory
+data/raw/
+data/preprocessing/
diff --git a/data/classification/classifier.pickle b/data/classification/classifier.pickle
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index 00000000..27bc6821
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diff --git a/data/dimensionality_reduction/pipeline.pickle b/data/dimensionality_reduction/pipeline.pickle
new file mode 100644
index 00000000..566baf5a
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diff --git a/data/dimensionality_reduction/test.pickle b/data/dimensionality_reduction/test.pickle
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index 00000000..40ffb175
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diff --git a/data/dimensionality_reduction/training.pickle b/data/dimensionality_reduction/training.pickle
new file mode 100644
index 00000000..f87bd9b5
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diff --git a/data/dimensionality_reduction/validation.pickle b/data/dimensionality_reduction/validation.pickle
new file mode 100644
index 00000000..d3ced73e
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diff --git a/data/feature_extraction/pipeline.pickle b/data/feature_extraction/pipeline.pickle
new file mode 100644
index 00000000..e7be5a45
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diff --git a/data/feature_extraction/test.pickle b/data/feature_extraction/test.pickle
new file mode 100644
index 00000000..a96dba62
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diff --git a/data/feature_extraction/training.pickle b/data/feature_extraction/training.pickle
new file mode 100644
index 00000000..df5d0d53
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diff --git a/data/feature_extraction/validation.pickle b/data/feature_extraction/validation.pickle
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index 00000000..f3c5ced4
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