diff --git a/controls_backupToStorage.txt b/controls_backupToStorage.txt
index bf5e0ed..3c987cd 100644
--- a/controls_backupToStorage.txt
+++ b/controls_backupToStorage.txt
@@ -1,2 +1,2 @@
 UPD 2020-06-17_12:01:37 3338 FHEM/98_backupToStorage.pm
-UPD 2020-06-17_12:02:54 8823 lib/FHEM/backupToStorage.pm
+UPD 2020-06-17_14:37:42 9679 lib/FHEM/backupToStorage.pm
diff --git a/lib/FHEM/backupToStorage.pm b/lib/FHEM/backupToStorage.pm
index f9ab3e9..98a0112 100644
--- a/lib/FHEM/backupToStorage.pm
+++ b/lib/FHEM/backupToStorage.pm
@@ -47,10 +47,6 @@ BEGIN {
     GP_Import(
         qw(
           readingsSingleUpdate
-          readingsBulkUpdate
-          readingsBulkUpdateIfChanged
-          readingsBeginUpdate
-          readingsEndUpdate
           defs
           modules
           setKeyValue
@@ -145,6 +141,18 @@ sub Notify {
       if ( grep /^backup.done/,
         @{$events} && $devname eq 'global' && $init_done );
 
+    CheckAttributsForCredentials($hash)
+      if (
+        (
+            grep /^DELETEATTR.$name.(bTS_Host|bTS_User)$/,
+            @{$events}
+            or grep /^ATTR.$name.(bTS_Host|bTS_User).\S+$/,
+            @{$events}
+        )
+        && $devname eq 'global'
+        && $init_done
+      );
+
     return;
 }
 
@@ -352,4 +360,26 @@ sub DeletePassword {
     return;
 }
 
+sub CheckAttributsForCredentials {
+    my $hash = shift;
+
+    my $name = $hash->{NAME};
+
+    my $ncUser = AttrVal( $name, 'bTS_User', 'none' );
+    my $ncPass = ReadPassword( $hash, $name );
+    my $ncHost = AttrVal( $name, 'bTS_Host', 'none' );
+    my $ncPath = AttrVal( $name, 'bTS_Path', 'none' );
+    my $status = 'ready';
+
+    $status eq 'ready'
+            && $ncUser eq 'none'    ? 'no user credential attribut'
+      : $status eq 'ready'
+            && $ncHost eq 'none'    ? 'no host credential attribut'
+      : $status eq 'ready'
+            && !defined($ncPass)    ? 'no password set'
+      : $status;
+
+    return readingsSingleUpdate( $hash, 'state', $status, 1 );
+}
+
 1;