diff --git a/README.md b/README.md
index d1d348ead32433a2e79acf5afe2966042a27d907..b239837231f20a9943ddf9aa0cdcdf7f9a7d9ac3 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,182 @@
 task_categories:
 - text-classification
 
+configs:
+- config_name: all
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/all/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/all/test-*.parquet"
+- config_name: amazon-instant-video
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/amazon-instant-video/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/amazon-instant-video/test-*.parquet"
+- config_name: arts
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/arts/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/arts/test-*.parquet"  
+- config_name: automotive
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/automotive/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/automotive/test-*.parquet"
+- config_name: baby
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/baby/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/baby/test-*.parquet"
+- config_name: beauty
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/beauty/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/beauty/test-*.parquet"
+- config_name: book
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/book/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/book/test-*.parquet"
+- config_name: cell-phone
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/cell-phone/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/cell-phone/test-*.parquet"
+- config_name: clothing
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/clothing/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/clothing/test-*.parquet"
+- config_name: electronics
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/electronics/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/electronics/test-*.parquet"
+- config_name: gourmet-food
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/gourmet-food/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/gourmet-food/test-*.parquet"
+- config_name: health
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/health/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/health/test-*.parquet"
+- config_name: home-kitchen
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/home-kitchen/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/home-kitchen/test-*.parquet"
+- config_name: industrial-scientific
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/industrial-scientific/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/industrial-scientific/test-*.parquet"
+- config_name: jewelry
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/jewelry/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/jewelry/test-*.parquet"
+- config_name: kindle-store
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/kindle-store/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/kindle-store/test-*.parquet"
+- config_name: movie-tv
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/movie-tv/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/movie-tv/test-*.parquet"
+- config_name: music
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/music/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/music/test-*.parquet"
+- config_name: musical-instrument
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/musical-instrument/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/musical-instrument/test-*.parquet"
+- config_name: office
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/office/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/office/test-*.parquet"
+- config_name: patio
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/patio/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/patio/test-*.parquet"
+- config_name: pet-supply
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/pet-supply/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/pet-supply/test-*.parquet"
+- config_name: shoe
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/shoe/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/shoe/test-*.parquet"
+- config_name: software
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/software/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/software/test-*.parquet"
+- config_name: sports-outdoor
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/sports-outdoor/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/sports-outdoor/test-*.parquet"
+- config_name: tools-home-improvement
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/tools-home-improvement/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/tools-home-improvement/test-*.parquet"
+- config_name: toy-game
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/toy-game/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/toy-game/test-*.parquet"
+- config_name: video-game
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/video-game/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/video-game/test-*.parquet"
+- config_name: all
+  data_files:
+  - split: train
+    path: "amazon_reviews_2013/watch/train-*.parquet"
+  - split: test
+    path: "amazon_reviews_2013/watch/test-*.parquet"
+
 dataset_info:
   features:
     - name: product/title
diff --git a/amazon_reviews_2013/test-0000-of-0018.parquet b/amazon_reviews_2013/all/test-0001.parquet
similarity index 100%
rename from amazon_reviews_2013/test-0000-of-0018.parquet
rename to amazon_reviews_2013/all/test-0001.parquet
diff --git a/amazon_reviews_2013/test-0001-of-0018.parquet b/amazon_reviews_2013/all/test-0002.parquet
similarity index 100%
rename from amazon_reviews_2013/test-0001-of-0018.parquet
rename to amazon_reviews_2013/all/test-0002.parquet
diff --git a/amazon_reviews_2013/test-0002-of-0018.parquet b/amazon_reviews_2013/all/test-0003.parquet
similarity index 100%
rename from amazon_reviews_2013/test-0002-of-0018.parquet
rename to amazon_reviews_2013/all/test-0003.parquet
diff --git a/amazon_reviews_2013/test-0003-of-0018.parquet b/amazon_reviews_2013/all/test-0004.parquet
similarity index 100%
rename from amazon_reviews_2013/test-0003-of-0018.parquet
rename to amazon_reviews_2013/all/test-0004.parquet
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similarity index 100%
rename from amazon_reviews_2013/test-0004-of-0018.parquet
rename to amazon_reviews_2013/all/test-0005.parquet
diff --git a/amazon_reviews_2013/test-0005-of-0018.parquet b/amazon_reviews_2013/all/test-0006.parquet
similarity index 100%
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similarity index 100%
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similarity index 100%
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similarity index 100%
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similarity index 100%
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similarity index 100%
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similarity index 100%
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similarity index 100%
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similarity index 100%
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similarity index 100%
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new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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diff --git a/amazon_reviews_2013/toy-game/test-0001.parquet b/amazon_reviews_2013/toy-game/test-0001.parquet
new file mode 100644
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--- /dev/null
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new file mode 100644
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--- /dev/null
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diff --git a/amazon_reviews_2013/video-game/test-0001.parquet b/amazon_reviews_2013/video-game/test-0001.parquet
new file mode 100644
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--- /dev/null
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--- /dev/null
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diff --git a/amazon_reviews_2013/watch/test-0001.parquet b/amazon_reviews_2013/watch/test-0001.parquet
new file mode 100644
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--- /dev/null
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+size 4278873
diff --git a/amazon_reviews_2013/watch/train-0001.parquet b/amazon_reviews_2013/watch/train-0001.parquet
new file mode 100644
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--- /dev/null
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diff --git a/convert.py b/convert.py
index ddf6c5288efc6d643f166ded452f9cca4a533c82..d4489d8c8db602e5a6b34ec676195ce282f39eeb 100644
--- a/convert.py
+++ b/convert.py
@@ -9,7 +9,7 @@ Usage:
 import os
 import gzip
 
-from glob import glob
+from slugify import slugify
 
 import pandas as pd
 
@@ -62,36 +62,36 @@ REVIEW_SCORE = {
 CATEGORIES_LIST = list(CATEGORIES.values())
 
 
-def to_parquet():
+def to_parquet(categories, output_dir):
     """
     Convert a single file to parquet
     """
     n_chunks = 0
     data = []
 
-    for filename in CATEGORIES:
+    for filename in categories:
 
         for entry in parse_file(filename):
             data.append(entry)
 
             if len(data) == CHUNK_SIZE:
-                save_parquet(data, n_chunks)
+                save_parquet(data, n_chunks, output_dir)
                 data = []
                 n_chunks += 1
 
     if data:
-        save_parquet(data, n_chunks)
+        save_parquet(data, n_chunks, output_dir)
         n_chunks += 1
 
     return n_chunks
 
 
-def save_parquet(data, chunk):
+def save_parquet(data, chunk, output_dir):
     """
     Save data to parquet
     """
-    fname_train = os.path.join(OUTPUT_DIR, f"train-{chunk:04d}-of-nchunks.parquet")
-    fname_test = os.path.join(OUTPUT_DIR, f"test-{chunk:04d}-of-nchunks.parquet")
+    fname_train = os.path.join(output_dir, f"train-{chunk+1:04d}.parquet")
+    fname_test = os.path.join(output_dir, f"test-{chunk+1:04d}.parquet")
 
     df = pd.DataFrame(data)
 
@@ -156,26 +156,32 @@ def clean(entry):
     return entry
 
 
-def rename_chunks(n_chunks):
+def create_directories():
     """
-    Replace nchunks in filename by the actual number of chunks
+    Create all output directories
     """
-    for fname in glob(os.path.join(OUTPUT_DIR, "*-of-nchunks.parquet")):
-        new_fname = fname.replace("-nchunks", f"-{n_chunks:04d}")
-        os.rename(fname, new_fname)
+    if not os.path.exists(OUTPUT_DIR):
+        os.makedirs(OUTPUT_DIR, exist_ok=True)
+
+    for category in CATEGORIES.values():
+        os.makedirs(os.path.join(OUTPUT_DIR, slugify(category)), exist_ok=True)
+
+    os.makedirs(os.path.join(OUTPUT_DIR, "all"), exist_ok=True)
 
 
 def run():
     """
     Convert all files to parquet
     """
-    if not os.path.exists(OUTPUT_DIR):
-        os.makedirs(OUTPUT_DIR)
+    create_directories()
 
-    n_chunks = to_parquet()
-    print(f"{n_chunks} chunks saved")
+    for path, category in CATEGORIES.items():
+        to_parquet(
+            {path: category},
+            os.path.join(OUTPUT_DIR, slugify(category)),
+        )
 
-    rename_chunks(n_chunks)
+    to_parquet(CATEGORIES, os.path.join(OUTPUT_DIR, "all"))
 
 
 if __name__ == "__main__":