diff --git a/R/createClusterST.R b/R/createClusterST.R
index 82ed8522..2a8dfdfb 100644
--- a/R/createClusterST.R
+++ b/R/createClusterST.R
@@ -246,7 +246,15 @@ createClusterST <- function(area,
         x = k, row.names = FALSE, col.names = FALSE, sep = "\t",
         file = file.path(inputPath, "st-storage", "series", tolower(area), tolower(cluster_name), paste0(storage_value[[name]]$string, ".txt"))
       )
-    } 
+    } else {
+      # write data 
+      fwrite(
+        x = get(name), row.names = FALSE, col.names = FALSE, sep = "\t",
+        file = file.path(inputPath, "st-storage", "series", tolower(area), 
+                         tolower(cluster_name), 
+                         paste0(storage_value[[name]]$string, ".txt"))
+      )
+    }
   }
   
   # Update simulation options object
diff --git a/tests/testthat/test-createClusterST.R b/tests/testthat/test-createClusterST.R
index 7505e323..2310e6f9 100644
--- a/tests/testthat/test-createClusterST.R
+++ b/tests/testthat/test-createClusterST.R
@@ -121,6 +121,41 @@ if (opts_test$antaresVersion >= 860){
     # check default values
     testthat::expect_equal(df_ref_default_value$mean, test_txt_value$mean)
   
+    
+    ## creation cluster (explicit data) ----
+    val <- 0.7
+    val_mat <- matrix(val, 8760)
+    
+    opts_test <- createClusterST(area = area_test, 
+                    cluster_name = "test_storage", 
+                    storage_parameters = storage_values_default()[1], 
+                    PMAX_injection = val_mat, 
+                    PMAX_withdrawal = val_mat, 
+                    inflows = val_mat, 
+                    lower_rule_curve = val_mat, 
+                    upper_rule_curve = val_mat, 
+                    overwrite = TRUE, 
+                    opts = opts_test)
+    
+    ## check name cluster created
+    namecluster_check <- paste(area_test, "test_storage", sep = "_")
+    testthat::expect_true(namecluster_check %in% 
+                            levels(readClusterSTDesc(opts = opts_test)$cluster))
+    
+    ## check data
+    
+    # read series (with readInputTS)
+    st_ts <- readInputTS(st_storage = "all", opts = opts_test)
+    
+    # check to find 5 names files created previously
+    filter_st_ts <- st_ts[cluster %in% namecluster_check, 
+                          list(mean=mean(`st-storage`)), 
+                          by=name_file]
+    
+    testthat::expect_true(all(filter_st_ts$name_file %in% 
+                            original_files_names))
+    testthat::expect_equal(val, unique(filter_st_ts$mean))
+    
   
   ## remove cluster----  
     # RemoveClusterST (if no cluster => function read return error => see readClusterDesc tests)