diff --git a/lasp/lasp_measurement.py b/lasp/lasp_measurement.py
index 2bb1ee4..fb7dd52 100644
--- a/lasp/lasp_measurement.py
+++ b/lasp/lasp_measurement.py
@@ -737,10 +737,12 @@ class Measurement:
             delimiter: Column delimiter
             firstcoltime: If true, the first column is the treated as the
             sample time.
+            force: If True, overwrites existing files with specified `mfn`
+            name.
         """
         if os.path.splitext(mfn)[1] != '.h5':
             mfn += '.h5'
-        if os.path.exists(mfn):
+        if os.path.exists(mfn) and not force:
             raise ValueError(f'File {mfn} already exist.')
         if timestamp is None:
             timestamp = int(time.time())