preprocess.md

@@ -25,4 +25,9 @@ Opened "FR.OGS1.00.HHZ.trace.int8.h5" with sec2 driver.
     Type:      native int
 [...]
 ```
-
+```
+lecoinal@f-dahu:/bettik/lecoinal/GEOBS$ ls -lh
+total 3.6G
+-rw-r--r-- 1 lecoinal l-isterre 2.2G Nov 22 11:32 FR.OGS1.00.HHZ.trace.int8.h5
+-rw-r--r-- 1 lecoinal l-isterre 1.5G Nov 22 11:22 FR.OGS3.00.HHZ.trace.int8.h5
+```
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