diff --git a/core/api.py b/core/api.py
index e8e3f1d..3f55e61 100644
--- a/core/api.py
+++ b/core/api.py
@@ -410,6 +410,20 @@ def save_operation():
 
             f.write(text.lstrip())
 
+        loader = load_point_data_by_path(pdt_path, cheaper=cheaper)
+
+        if pdt_path.endswith(".ascii"):
+            ext = "ascii"
+        elif pdt_path.endswith(".parquet"):
+            ext = "parquet"
+        else:
+            ext = "ascii"
+
+        exclude_cols = payload["excludePredictors"]
+        cols = [col for col in loader.columns if col not in exclude_cols]
+
+        loader.clone(*cols, path=output_path / f"PDT.{ext}")
+
     return Response(json.dumps({}), mimetype="application/json")
 
 
diff --git a/core/loaders/__init__.py b/core/loaders/__init__.py
index 9791a98..54d8313 100644
--- a/core/loaders/__init__.py
+++ b/core/loaders/__init__.py
@@ -2,6 +2,7 @@
 import re
 from dataclasses import dataclass
 from enum import Enum
+from pathlib import Path
 from typing import List, Union
 
 import pandas as pd
@@ -55,9 +56,7 @@ def units(self) -> dict:
         obs = {m.group(1): m.group(2)} if m else {}
 
         return {
-            "predictors": {
-                k: v.replace("NoUnit", "-") for k, v in predictors.items()
-            },
+            "predictors": {k: v.replace("NoUnit", "-") for k, v in predictors.items()},
             "observations": obs,
             "predictand": predictand,
         }
@@ -71,6 +70,10 @@ def columns(self) -> List[str]:
     def select(self, *args: str, series: bool = True) -> Union[pd.DataFrame, pd.Series]:
         raise NotImplementedError
 
+    @abc.abstractmethod
+    def clone(self, *args: str, path: Path):
+        raise NotImplementedError
+
     @property
     def error_type(self) -> ErrorType:
         """
diff --git a/core/loaders/ascii.py b/core/loaders/ascii.py
index d50e395..9908c94 100644
--- a/core/loaders/ascii.py
+++ b/core/loaders/ascii.py
@@ -2,6 +2,7 @@
 from dataclasses import dataclass, field
 from functools import partial
 from itertools import takewhile
+from pathlib import Path
 from typing import List, Optional, Union
 
 import attr
@@ -86,6 +87,14 @@ def select(self, *args: str, series: bool = True) -> Union[pd.DataFrame, pd.Seri
             result = result[col]
         return result
 
+    def clone(self, *args: str, path: Path):
+        encoder = ASCIIEncoder(path=path)
+        encoder.add_header(self.metadata.get("header", ""))
+
+        for chunk in self:
+            filtered_chunk = chunk[list(args)]
+            encoder.add_columns_chunk(filtered_chunk.to_dict())
+
     def __iter__(self) -> "ASCIIDecoder":
         self._current_csv_offset = 0
         return self
diff --git a/core/loaders/parquet.py b/core/loaders/parquet.py
index 44a8b6a..7bd208f 100644
--- a/core/loaders/parquet.py
+++ b/core/loaders/parquet.py
@@ -1,5 +1,6 @@
 from collections import OrderedDict
 from dataclasses import dataclass, field
+from pathlib import Path
 from typing import List, Optional, Union
 
 import attr
@@ -107,6 +108,8 @@ def columns(self) -> List[str]:
     def dataframe(self) -> pd.DataFrame:
         if self._dataframe is None:
             self._dataframe = pd.read_parquet(self.path, engine="pyarrow")
+            if "__index_level_0__" in self._dataframe:
+                self._dataframe = self._dataframe.drop(["__index_level_0__"], axis=1)
 
         return self._dataframe
 
@@ -127,6 +130,16 @@ def select(self, *args: str, series: bool = True) -> Union[pd.DataFrame, pd.Seri
             result = result[col]
         return result
 
+    def clone(self, *args: str, path: Path):
+        encoder = ParquetPointDataTableWriter(path=path)
+        encoder.add_header(self.metadata.get("header", ""))
+
+        for chunk in self:
+            filtered_chunk = chunk[list(args)]
+            encoder.add_columns_chunk(filtered_chunk.to_dict())
+
+        encoder.add_footer(self.metadata.get("footer", ""))
+
     def __iter__(self) -> "ParquetPointDataTableReader":
         self._current_row_group = 0
         return self
diff --git a/tests/functional/test_processing.py b/tests/functional/test_processing.py
index 08ea3e8..c48eff5 100644
--- a/tests/functional/test_processing.py
+++ b/tests/functional/test_processing.py
@@ -8,7 +8,7 @@
 def test_alfa(client, alfa_cassette, alfa_loader, fmt, tmp_path):
     path = tmp_path / f"pdt.{fmt.lower()}"
     request = alfa_cassette(output_path=str(path), fmt=fmt)
-    response = client.post("/computation-logs", json=request)
+    response = client.post("/computations/start", json=request)
     assert response.status_code == 200
 
     got_loader = load_point_data_by_path(path=str(path))
diff --git a/tests/unit/loaders/test_ascii.py b/tests/unit/loaders/test_ascii.py
index 92199f0..63f6a86 100644
--- a/tests/unit/loaders/test_ascii.py
+++ b/tests/unit/loaders/test_ascii.py
@@ -1,4 +1,5 @@
 import numpy
+from pandas.testing import assert_frame_equal
 
 from core.loaders.ascii import ASCIIDecoder
 from tests.conf import TEST_DATA_DIR
@@ -31,3 +32,16 @@ def test_alfa_units():
         },
         "observations": {"tp": "mm"},
     }
+
+
+def test_good_ascii_file_clone(tmp_path):
+    path = TEST_DATA_DIR / "good_ascii_file.ascii"
+    data = ASCIIDecoder(path=path)
+
+    exclude_cols = ["TP", "CAPE"]
+    cloned_path = tmp_path / "good_ascii_file.ascii"
+    cols = [col for col in data.columns if col not in exclude_cols]
+    data.clone(*cols, path=cloned_path)
+    cloned_data = ASCIIDecoder(path=cloned_path)
+
+    assert_frame_equal(cloned_data.dataframe, data.dataframe.drop(exclude_cols, axis=1))
diff --git a/tests/unit/loaders/test_parquet.py b/tests/unit/loaders/test_parquet.py
index 1785013..2f92257 100644
--- a/tests/unit/loaders/test_parquet.py
+++ b/tests/unit/loaders/test_parquet.py
@@ -30,3 +30,28 @@ def test_good_parquet_file():
     assert df.memory_usage(deep=True).sum() > df_pq.memory_usage(deep=True).sum()
 
     assert_frame_equal(df_pq, df, check_dtype=False, check_categorical=False)
+
+
+def test_good_parquet_file_clone(tmp_path):
+    path = TEST_DATA_DIR / "good_parquet.ascii"
+    df = ASCIIDecoder(path=path).dataframe
+
+    with NamedTemporaryFile() as f:
+        w = ParquetPointDataTableWriter(f.name)
+        w.add_columns_chunk(df.copy())
+        w.close()
+
+        r = ParquetPointDataTableReader(f.name)
+        exclude_cols = ["tp_acc", "cape_wa"]
+        cloned_path = tmp_path / "good_parquet.parquet"
+        cols = [col for col in r.columns if col not in exclude_cols]
+        r.clone(*cols, path=cloned_path)
+
+        cloned_data = ParquetPointDataTableReader(cloned_path)
+
+        assert_frame_equal(
+            cloned_data.dataframe,
+            df.drop(exclude_cols, axis=1),
+            check_dtype=False,
+            check_categorical=False,
+        )
diff --git a/ui/redux/postprocessingReducer.js b/ui/redux/postprocessingReducer.js
index 41e7ea0..0a0f966 100644
--- a/ui/redux/postprocessingReducer.js
+++ b/ui/redux/postprocessingReducer.js
@@ -56,6 +56,10 @@ export default (state = defaultState, action) => {
       }
     }
 
+    case 'POSTPROCESSING.SET_EXCLUDED_PREDICTORS': {
+      return { ...state, excludedPredictors: action.data }
+    }
+
     case 'POSTPROCESSING.SET_Y_LIM': {
       return { ...state, yLim: action.value }
     }
diff --git a/ui/workflows/C/2/levels/actions.js b/ui/workflows/C/2/levels/actions.js
index b865d36..e4fc202 100644
--- a/ui/workflows/C/2/levels/actions.js
+++ b/ui/workflows/C/2/levels/actions.js
@@ -7,6 +7,11 @@ export const setFields = fields => ({
   data: fields,
 })
 
+export const setExcludedPredictors = items => ({
+  type: 'POSTPROCESSING.SET_EXCLUDED_PREDICTORS',
+  data: items,
+})
+
 export const onFieldsSortEnd = (
   fields,
   thrGridIn,
diff --git a/ui/workflows/C/2/levels/component.js b/ui/workflows/C/2/levels/component.js
index 1cc9180..e32fa94 100644
--- a/ui/workflows/C/2/levels/component.js
+++ b/ui/workflows/C/2/levels/component.js
@@ -25,7 +25,15 @@ const SortableItem = SortableElement(({ value, showDelete, onDelete }) => (
 ))
 
 const SortableList = SortableContainer(
-  ({ items, breakpoints, labels, fieldRanges, setFields, setBreakpoints }) => (
+  ({
+    items,
+    breakpoints,
+    labels,
+    fieldRanges,
+    setFields,
+    setBreakpoints,
+    setExcludedPredictors,
+  }) => (
     <Segment.Group raised size="mini" style={{ width: '20%' }}>
       {items.map((value, index) => (
         <SortableItem
@@ -41,6 +49,8 @@ const SortableList = SortableContainer(
               .map(row => row.slice(0, -2))
             const newLabels = labels.slice(0, -2)
 
+            const excludePredictors = labels.slice(-2)[0].replace('_thrL', '')
+            setExcludedPredictors(excludePredictors)
             setBreakpoints(newLabels, matrix, fieldRanges)
           }}
         />
@@ -57,6 +67,7 @@ const Levels = props => (
       items={props.fields}
       setFields={props.setFields}
       setBreakpoints={props.setBreakpoints}
+      setExcludedPredictors={props.setExcludedPredictors}
       fieldRanges={props.fieldRanges}
       breakpoints={props.thrGridOut}
       labels={props.labels}
diff --git a/ui/workflows/C/2/levels/container.js b/ui/workflows/C/2/levels/container.js
index 0b8b558..8cbad52 100644
--- a/ui/workflows/C/2/levels/container.js
+++ b/ui/workflows/C/2/levels/container.js
@@ -2,7 +2,7 @@ import { connect } from 'react-redux'
 
 import Levels from './component'
 
-import { onFieldsSortEnd, setFields } from './actions'
+import { onFieldsSortEnd, setFields, setExcludedPredictors } from './actions'
 import { setBreakpoints } from '../breakpoints/actions'
 
 const mapStateToProps = state => ({
@@ -23,6 +23,8 @@ const mapDispatchToProps = dispatch => ({
 
   setBreakpoints: (labels, matrix, fieldRanges) =>
     dispatch(setBreakpoints(labels, matrix, fieldRanges)),
+
+  setExcludedPredictors: items => dispatch(setExcludedPredictors(items)),
 })
 
 export default connect(
diff --git a/ui/workflows/C/2/saveOperation/component.js b/ui/workflows/C/2/saveOperation/component.js
index 3e49f1b..e1ba03c 100644
--- a/ui/workflows/C/2/saveOperation/component.js
+++ b/ui/workflows/C/2/saveOperation/component.js
@@ -190,6 +190,7 @@ class SaveOperation extends Component {
         cheaper: this.props.cheaper,
         mode: this.props.mode,
         fieldRanges: this.props.fieldRanges,
+        excludePredictors: this.props.excludedPredictors,
         breakpointsCSV:
           this.props.mode === 'breakpoints' || this.props.mode === 'all'
             ? this.getBreakpointsCSV()
diff --git a/ui/workflows/C/2/saveOperation/container.js b/ui/workflows/C/2/saveOperation/container.js
index b89c6b3..f4c8e3b 100644
--- a/ui/workflows/C/2/saveOperation/container.js
+++ b/ui/workflows/C/2/saveOperation/container.js
@@ -10,6 +10,7 @@ const mapStateToProps = state => ({
   yLim: state.postprocessing.yLim,
   cheaper: state.preloader.cheaper,
   breakpoints: state.postprocessing.thrGridOut,
+  excludedPredictors: state.postprocessing.excludedPredictors,
   path: state.preloader.path,
   labels: state.postprocessing.thrGridIn[0].slice(1).map(cell => cell.value),
   error: state.binning.error,