diff --git a/data/Dockerfiles/dockerapi/server.py b/data/Dockerfiles/dockerapi/server.py
index ede9433c..0c4672df 100644
--- a/data/Dockerfiles/dockerapi/server.py
+++ b/data/Dockerfiles/dockerapi/server.py
@@ -64,11 +64,11 @@ class container_post(Resource):
         print("api call: %s, container_id: %s" % (api_call_method_name, container_id))
         return api_call_method(container_id)
       except Exception as e:
-        print("error - container_post: %s" % str(e))  
+        print("error - container_post: %s" % str(e))
         return jsonify(type='danger', msg=str(e))
 
     else:
-      return jsonify(type='danger', msg='invalid container id or missing action')        
+      return jsonify(type='danger', msg='invalid container id or missing action')
 
 
   # api call: container_post - post_action: stop
@@ -107,7 +107,7 @@ class container_post(Resource):
 
   # api call: container_post - post_action: exec - cmd: mailq - task: delete
   def container_post__exec__mailq__delete(self, container_id):
-    if 'items' in request.json:  
+    if 'items' in request.json:
       r = re.compile("^[0-9a-fA-F]+$")
       filtered_qids = filter(r.match, request.json['items'])
       if filtered_qids:
@@ -121,7 +121,7 @@ class container_post(Resource):
 
   # api call: container_post - post_action: exec - cmd: mailq - task: hold
   def container_post__exec__mailq__hold(self, container_id):
-    if 'items' in request.json:  
+    if 'items' in request.json:
       r = re.compile("^[0-9a-fA-F]+$")
       filtered_qids = filter(r.match, request.json['items'])
       if filtered_qids:
@@ -135,7 +135,7 @@ class container_post(Resource):
 
    # api call: container_post - post_action: exec - cmd: mailq - task: unhold
   def container_post__exec__mailq__unhold(self, container_id):
-    if 'items' in request.json:  
+    if 'items' in request.json:
       r = re.compile("^[0-9a-fA-F]+$")
       filtered_qids = filter(r.match, request.json['items'])
       if filtered_qids:
@@ -149,7 +149,7 @@ class container_post(Resource):
 
   # api call: container_post - post_action: exec - cmd: mailq - task: deliver
   def container_post__exec__mailq__deliver(self, container_id):
-    if 'items' in request.json:  
+    if 'items' in request.json:
       r = re.compile("^[0-9a-fA-F]+$")
       filtered_qids = filter(r.match, request.json['items'])
       if filtered_qids:
@@ -206,7 +206,7 @@ class container_post(Resource):
   def container_post__exec__system__df(self, container_id):
     if 'dir' in request.json:
       for container in docker_client.containers.list(filters={"id": container_id}):
-        df_return = container.exec_run(["/bin/bash", "-c", "/bin/df -H '" + request.json['dir'].replace("'", "'\\''") + "' | /usr/bin/tail -n1 | /usr/bin/tr -s [:blank:] | /usr/bin/tr ' ' ','"], user='nobody')
+        df_return = container.exec_run(["/bin/bash", "-c", "/bin/df '" + request.json['dir'].replace("'", "'\\''") + "' | /usr/bin/tail -n1 | /usr/bin/tr -s [:blank:] | /usr/bin/tr ' ' ','"], user='nobody')
         if df_return.exit_code == 0:
           return df_return.output.decode('utf-8').rstrip()
         else:
@@ -264,7 +264,7 @@ class container_post(Resource):
   def container_post__exec__sieve__print(self, container_id):
     if 'username' in request.json and 'script_name' in request.json:
       for container in docker_client.containers.list(filters={"id": container_id}):
-        cmd = ["/bin/bash", "-c", "/usr/bin/doveadm sieve get -u '" + request.json['username'].replace("'", "'\\''") + "' '" + request.json['script_name'].replace("'", "'\\''") + "'"]  
+        cmd = ["/bin/bash", "-c", "/usr/bin/doveadm sieve get -u '" + request.json['username'].replace("'", "'\\''") + "' '" + request.json['script_name'].replace("'", "'\\''") + "'"]
         sieve_return = container.exec_run(cmd)
         return exec_run_handler('utf8_text_only', sieve_return)
 
@@ -286,7 +286,7 @@ class container_post(Resource):
       for container in docker_client.containers.list(filters={"id": container_id}):
         cmd = "/usr/bin/rspamadm pw -e -p '" + request.json['raw'].replace("'", "'\\''") + "' 2> /dev/null"
         cmd_response = exec_cmd_container(container, cmd, user="_rspamd")
-        
+
         matched = False
         for line in cmd_response.split("\n"):
           if '$2$' in line:
@@ -306,7 +306,7 @@ class container_post(Resource):
             return jsonify(type='success', msg='command completed successfully')
         else:
             return jsonify(type='danger', msg='command did not complete')
-        
+
 
 def exec_cmd_container(container, cmd, user, timeout=2, shell_cmd="/bin/bash"):
 
@@ -333,7 +333,7 @@ def exec_cmd_container(container, cmd, user, timeout=2, shell_cmd="/bin/bash"):
       except:
         pass
     return ''.join(total_data)
-    
+
   try :
     socket = container.exec_run([shell_cmd], stdin=True, socket=True, user=user).output._sock
     if not cmd.endswith("\n"):
diff --git a/data/web/css/site/debug.css b/data/web/css/site/debug.css
index 89eaf41a..9b45f028 100644
--- a/data/web/css/site/debug.css
+++ b/data/web/css/site/debug.css
@@ -44,4 +44,14 @@ tbody {
 .container-indicator {
   width: 15px;
   height: 15px;
-}
\ No newline at end of file
+}
+.disk_space {
+    margin-top: 20px;
+}
+.progress-bar-committed {
+    background-color: #B6E1F2;
+}
+.usage-info {
+    display: inline-block;
+    margin-right: 5px;
+}
diff --git a/data/web/debug.php b/data/web/debug.php
index 67417bc2..03752d34 100644
--- a/data/web/debug.php
+++ b/data/web/debug.php
@@ -43,6 +43,11 @@ else {
         <?php
           $exec_fields = array('cmd' => 'system', 'task' => 'df', 'dir' => '/var/vmail');
           $vmail_df = explode(',', json_decode(docker('post', 'dovecot-mailcow', 'exec', $exec_fields), true));
+          $used_percent = substr($vmail_df[4], 0, -1);
+          $quota_stats = mailbox('get','quota_stats');
+          $quotaPercent1 = round(($quota_stats['total_quota']/$vmail_df[3])*100);
+          $quotaPercent2 = round((($quota_stats['total_quota']-$quota_stats['used_bytes'])/$vmail_df[3])*100);
+          $quotaPercent2 = ($quotaPercent2+$used_percent>100) ? 100-$used_percent : $quotaPercent2;
         ?>
         <div role="tabpanel" class="tab-pane active" id="tab-containers">
           <div class="panel panel-default">
@@ -53,12 +58,15 @@ else {
               <div class="row">
                 <div class="col-sm-3">
                   <p>/var/vmail on <?=$vmail_df[0];?></p>
-                  <p><?=$vmail_df[2];?> / <?=$vmail_df[1];?> (<?=$vmail_df[4];?>)</p>
+                  <p class="disk_space"><?=$lang['debug']['disk_space'];?> <?=formatBytes($vmail_df[3]*1024);?></p>
                 </div>
                 <div class="col-sm-9">
                   <div class="progress">
-                    <div class="progress-bar progress-bar-info" role="progressbar" style="width:<?=$vmail_df[4];?>"></div>
+                    <div class="progress-bar progress-bar-info" role="progressbar" style="width:<?=$used_percent;?>%"></div>
+                    <div class="progress-bar progress-bar-committed" role="progressbar" style="width:<?=$quotaPercent2;?>%"></div>
                   </div>
+                  <p><span class="container-indicator label usage-info progress-bar-info">&nbsp;</span> <?=$lang['debug']['disk_used'];?> <?=formatBytes($vmail_df[2]*1024);?> (<?=$used_percent;?>%)</p>
+                  <p><span class="container-indicator label usage-info progress-bar-committed">&nbsp;</span> <?=$lang['debug']['total_quota'];?> <?=formatBytes($quota_stats['total_quota']*1024);?> (<?=$quotaPercent1;?>%)</p>
                 </div>
               </div>
             </div>
@@ -344,7 +352,6 @@ $lang_admin = json_encode($lang['admin']);
 echo "var lang = ". $lang_admin . ";\n";
 echo "var csrf_token = '". $_SESSION['CSRF']['TOKEN'] . "';\n";
 echo "var log_pagination_size = '". $LOG_PAGINATION_SIZE . "';\n";
-
 ?>
 </script>
 <?php
diff --git a/data/web/inc/functions.domain_admin.inc.php b/data/web/inc/functions.domain_admin.inc.php
index 064ba6c8..6c821aa1 100644
--- a/data/web/inc/functions.domain_admin.inc.php
+++ b/data/web/inc/functions.domain_admin.inc.php
@@ -44,12 +44,12 @@ function domain_admin($_action, $_data = null) {
         WHERE `username` = :username");
       $stmt->execute(array(':username' => $username));
       $num_results[] = count($stmt->fetchAll(PDO::FETCH_ASSOC));
-      
+
       $stmt = $pdo->prepare("SELECT `username` FROM `admin`
         WHERE `username` = :username");
       $stmt->execute(array(':username' => $username));
       $num_results[] = count($stmt->fetchAll(PDO::FETCH_ASSOC));
-      
+
       $stmt = $pdo->prepare("SELECT `username` FROM `domain_admins`
         WHERE `username` = :username");
       $stmt->execute(array(':username' => $username));
@@ -373,7 +373,7 @@ function domain_admin($_action, $_data = null) {
       }
       $stmt = $pdo->query("SELECT DISTINCT
         `username`
-          FROM `domain_admins` 
+          FROM `domain_admins`
             WHERE `username` IN (
               SELECT `username` FROM `admin`
                 WHERE `superadmin`!='1'
@@ -409,7 +409,7 @@ function domain_admin($_action, $_data = null) {
         ':domain_admin' => $_data
       ));
       $row = $stmt->fetch(PDO::FETCH_ASSOC);
-      if (empty($row)) { 
+      if (empty($row)) {
         return false;
       }
       $domainadmindata['username'] = $row['username'];
diff --git a/data/web/inc/functions.mailbox.inc.php b/data/web/inc/functions.mailbox.inc.php
index 99fda2d8..7546c6c6 100644
--- a/data/web/inc/functions.mailbox.inc.php
+++ b/data/web/inc/functions.mailbox.inc.php
@@ -46,7 +46,7 @@ function mailbox($_action, $_type, $_data = null, $_extra = null) {
           $stmt = $pdo->prepare("SELECT `domain` FROM `mailbox` WHERE `username` = :username");
           $stmt->execute(array(':username' => $_SESSION['mailcow_cc_username']));
           $domain = $stmt->fetch(PDO::FETCH_ASSOC)['domain'];
-          $validity = strtotime("+".$_data["validity"]." hour"); 
+          $validity = strtotime("+".$_data["validity"]." hour");
           $letters = 'abcefghijklmnopqrstuvwxyz1234567890';
           $random_name = substr(str_shuffle($letters), 0, 24);
           $stmt = $pdo->prepare("INSERT INTO `spamalias` (`address`, `goto`, `validity`) VALUES
@@ -485,7 +485,7 @@ function mailbox($_action, $_type, $_data = null, $_extra = null) {
               'msg' => 'comment_too_long'
             );
             return false;
-          } 
+          }
           if (empty($addresses[0])) {
             $_SESSION['return'][] = array(
               'type' => 'danger',
@@ -841,7 +841,7 @@ function mailbox($_action, $_type, $_data = null, $_extra = null) {
             WHERE `domain` = :domain");
           $stmt->execute(array(':domain' => $domain));
           $DomainData = $stmt->fetch(PDO::FETCH_ASSOC);
-          $stmt = $pdo->prepare("SELECT 
+          $stmt = $pdo->prepare("SELECT
             COUNT(*) as count,
             COALESCE(ROUND(SUM(`quota`)/1048576), 0) as `quota`
               FROM `mailbox`
@@ -945,7 +945,7 @@ function mailbox($_action, $_type, $_data = null, $_extra = null) {
             );
             return false;
           }
-          $stmt = $pdo->prepare("INSERT INTO `mailbox` (`username`, `password`, `name`, `quota`, `local_part`, `domain`, `attributes`, `active`) 
+          $stmt = $pdo->prepare("INSERT INTO `mailbox` (`username`, `password`, `name`, `quota`, `local_part`, `domain`, `attributes`, `active`)
             VALUES (:username, :password_hashed, :name, :quota_b, :local_part, :domain, :mailbox_attrs, :active)");
           $stmt->execute(array(
             ':username' => $username,
@@ -1073,7 +1073,7 @@ function mailbox($_action, $_type, $_data = null, $_extra = null) {
             );
             return false;
           }
-          $stmt = $pdo->prepare("INSERT INTO `mailbox` (`username`, `password`, `name`, `quota`, `local_part`, `domain`, `active`, `multiple_bookings`, `kind`) 
+          $stmt = $pdo->prepare("INSERT INTO `mailbox` (`username`, `password`, `name`, `quota`, `local_part`, `domain`, `active`, `multiple_bookings`, `kind`)
             VALUES (:name, 'RESOURCE', :description, 0, :local_part, :domain, :active, :multiple_bookings, :kind)");
           $stmt->execute(array(
             ':name' => $name,
@@ -1249,7 +1249,7 @@ function mailbox($_action, $_type, $_data = null, $_extra = null) {
                 'msg' => 'access_denied'
               );
               continue;
-            } 
+            }
             $stmt = $pdo->prepare("UPDATE `mailbox`
               SET `attributes` = JSON_SET(`attributes`, '$.quarantine_notification', :quarantine_notification)
                 WHERE `username` = :username");
@@ -1360,7 +1360,7 @@ function mailbox($_action, $_type, $_data = null, $_extra = null) {
               continue;
             }
             $validity = round((int)time() + ($_data['validity'] * 3600));
-            $stmt = $pdo->prepare("UPDATE `spamalias` SET `validity` = :validity WHERE 
+            $stmt = $pdo->prepare("UPDATE `spamalias` SET `validity` = :validity WHERE
               `address` = :address");
             $stmt->execute(array(
               ':address' => $address,
@@ -1888,7 +1888,7 @@ function mailbox($_action, $_type, $_data = null, $_extra = null) {
                 );
                 continue;
               }
-              $stmt = $pdo->prepare("UPDATE `domain` SET 
+              $stmt = $pdo->prepare("UPDATE `domain` SET
               `description` = :description,
               `gal` = :gal
                 WHERE `domain` = :domain");
@@ -1928,7 +1928,7 @@ function mailbox($_action, $_type, $_data = null, $_extra = null) {
                 continue;
               }
               // todo: should be using api here
-              $stmt = $pdo->prepare("SELECT 
+              $stmt = $pdo->prepare("SELECT
                   COUNT(*) AS count,
                   MAX(COALESCE(ROUND(`quota`/1048576), 0)) AS `biggest_mailbox`,
                   COALESCE(ROUND(SUM(`quota`)/1048576), 0) AS `quota_all`
@@ -2009,7 +2009,7 @@ function mailbox($_action, $_type, $_data = null, $_extra = null) {
                 );
                 continue;
               }
-              $stmt = $pdo->prepare("UPDATE `domain` SET 
+              $stmt = $pdo->prepare("UPDATE `domain` SET
               `relay_all_recipients` = :relay_all_recipients,
               `backupmx` = :backupmx,
               `gal` = :gal,
@@ -2071,7 +2071,7 @@ function mailbox($_action, $_type, $_data = null, $_extra = null) {
               $domain     = $is_now['domain'];
               $quota_b    = $quota_m * 1048576;
               $password   = (!empty($_data['password'])) ? $_data['password'] : null;
-              $password2  = (!empty($_data['password2'])) ? $_data['password2'] : null; 
+              $password2  = (!empty($_data['password2'])) ? $_data['password2'] : null;
             }
             else {
               $_SESSION['return'][] = array(
@@ -2517,14 +2517,14 @@ function mailbox($_action, $_type, $_data = null, $_extra = null) {
           }
           $stmt = $pdo->prepare("SELECT `domain` FROM `domain`
             WHERE `domain` NOT IN (
-              SELECT REPLACE(`send_as`, '@', '') FROM `sender_acl` 
+              SELECT REPLACE(`send_as`, '@', '') FROM `sender_acl`
                 WHERE `logged_in_as` = :logged_in_as1
                   AND `external` = '0'
                   AND `send_as` LIKE '@%')
             UNION
             SELECT '*' FROM `domain`
               WHERE '*' NOT IN (
-                SELECT `send_as` FROM `sender_acl`  
+                SELECT `send_as` FROM `sender_acl`
                   WHERE `logged_in_as` = :logged_in_as2
                     AND `external` = '0'
               )");
@@ -2546,7 +2546,7 @@ function mailbox($_action, $_type, $_data = null, $_extra = null) {
           $stmt = $pdo->prepare("SELECT `address` FROM `alias`
             WHERE `goto` != :goto
               AND `address` NOT IN (
-                SELECT `send_as` FROM `sender_acl` 
+                SELECT `send_as` FROM `sender_acl`
                   WHERE `logged_in_as` = :logged_in_as
                     AND `external` = '0'
                     AND `send_as` NOT LIKE '@%')");
@@ -3074,11 +3074,11 @@ function mailbox($_action, $_type, $_data = null, $_extra = null) {
           if (!empty($row)) {
             $_data = $row['target_domain'];
           }
-          $stmt = $pdo->prepare("SELECT 
+          $stmt = $pdo->prepare("SELECT
               `domain`,
               `description`,
               `aliases`,
-              `mailboxes`, 
+              `mailboxes`,
               `defquota`,
               `maxquota`,
               `quota`,
@@ -3096,7 +3096,7 @@ function mailbox($_action, $_type, $_data = null, $_extra = null) {
             ':domain' => $_data
           ));
           $row = $stmt->fetch(PDO::FETCH_ASSOC);
-          if (empty($row)) { 
+          if (empty($row)) {
             return false;
           }
           $stmt = $pdo->prepare("SELECT COUNT(*) AS `count`,
@@ -3254,6 +3254,24 @@ function mailbox($_action, $_type, $_data = null, $_extra = null) {
           }
           return $resourcedata;
         break;
+        case 'quota_stats':
+          $quotadata = array();
+          if ($_SESSION['mailcow_cc_role'] != "admin") {
+            return false;
+          }
+          $stmt = $pdo->query("SELECT SUM(`quota2`.`bytes`) AS `bytes`
+              FROM `mailbox`, `quota2`, `domain`
+                WHERE `mailbox`.`kind` NOT REGEXP 'location|thing|group'
+                  AND `mailbox`.`username` = `quota2`.`username`
+                  AND `domain`.`domain` = `mailbox`.`domain`
+                  AND `domain`.`active` = 1");
+          $row = $stmt->fetch(PDO::FETCH_ASSOC);
+          $quotadata['used_bytes'] = $row['bytes']/1024;
+          $stmt = $pdo->query("SELECT SUM(`quota`) AS `quota` FROM `domain` WHERE `active`=1");
+          $row = $stmt->fetch(PDO::FETCH_ASSOC);
+          $quotadata['total_quota'] = $row['quota']*1024;
+          return $quotadata;
+        break;
       }
     break;
     case 'delete':
@@ -3724,7 +3742,7 @@ function mailbox($_action, $_type, $_data = null, $_extra = null) {
               curl_setopt($curl, CURLOPT_HTTPHEADER,array('Content-Type: text/xml'));
               curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
               curl_setopt($curl, CURLOPT_POST, 1);
-              curl_setopt($curl, CURLOPT_POSTFIELDS, '<delete><query>user:' . $username . '</query></delete>'); 
+              curl_setopt($curl, CURLOPT_POSTFIELDS, '<delete><query>user:' . $username . '</query></delete>');
               curl_setopt($curl, CURLOPT_TIMEOUT, 30);
               $response = curl_exec($curl);
               if ($response === false) {
diff --git a/data/web/lang/lang.de.php b/data/web/lang/lang.de.php
index 22c07caa..d0b6d119 100644
--- a/data/web/lang/lang.de.php
+++ b/data/web/lang/lang.de.php
@@ -149,8 +149,8 @@ $lang['success']['sogo_profile_reset'] = "ActiveSync Gerät des Benutzers %s wur
 $lang['success']['resource_removed'] = 'Ressource %s wurde entfernt';
 $lang['warning']['cannot_delete_self'] = 'Kann derzeit eingeloggten Benutzer nicht entfernen';
 $lang['warning']['no_active_admin'] = 'Kann letzten aktiven Administrator nicht deaktivieren';
-$lang['danger']['max_quota_in_use'] = 'Mailbox Speicherplatzlimit muss größer oder gleich %d MiB sein';
-$lang['danger']['domain_quota_m_in_use'] = 'Domain Speicherplatzlimit muss größer oder gleich %d MiB sein';
+$lang['danger']['max_quota_in_use'] = 'Mailbox-Speicherplatzlimit muss größer oder gleich %d MiB sein';
+$lang['danger']['domain_quota_m_in_use'] = 'Domain-Speicherplatzlimit muss größer oder gleich %d MiB sein';
 $lang['danger']['mailboxes_in_use'] = 'Maximale Anzahl an Mailboxen muss größer oder gleich %d sein';
 $lang['danger']['aliases_in_use'] = 'Maximale Anzahl an Aliassen muss größer oder gleich %d sein';
 $lang['danger']['sender_acl_invalid'] = 'Sender ACL %s ist ungültig';
@@ -375,7 +375,7 @@ $lang['edit']['mailbox'] = 'Mailbox bearbeiten';
 $lang['edit']['description'] = 'Beschreibung';
 $lang['edit']['max_aliases'] = 'Max. Aliasse';
 $lang['edit']['max_quota'] = 'Max. Größe per Mailbox (MiB)';
-$lang['edit']['domain_quota'] = 'Domain Speicherplatz gesamt (MiB)';
+$lang['edit']['domain_quota'] = 'Domain-Speicherplatz gesamt (MiB)';
 $lang['edit']['backup_mx_options'] = 'Backup MX Optionen';
 $lang['edit']['relay_domain'] = 'Diese Domain relayen';
 $lang['edit']['relay_all'] = 'Alle Empfänger-Adressen relayen';
@@ -474,7 +474,7 @@ $lang['add']['description'] = 'Beschreibung';
 $lang['add']['max_aliases'] = 'Max. mögliche Aliasse';
 $lang['add']['max_mailboxes'] = 'Max. mögliche Mailboxen';
 $lang['add']['mailbox_quota_m'] = 'Max. Speicherplatz pro Mailbox (MiB)';
-$lang['add']['domain_quota_m'] = 'Domain Speicherplatz gesamt (MiB)';
+$lang['add']['domain_quota_m'] = 'Domain-Speicherplatz gesamt (MiB)';
 $lang['add']['backup_mx_options'] = 'Backup MX Optionen';
 $lang['add']['relay_all'] = 'Alle Empfänger-Adressen relayen';
 $lang['add']['relay_domain'] = 'Relay Domain';
@@ -545,7 +545,7 @@ $lang['tfa']['confirm_totp_token'] = "Bitte bestätigen Sie die Änderung durch
 
 $lang['admin']['rspamd-com_settings'] = '<a href="https://rspamd.com/doc/configuration/settings.html#settings-structure" target="_blank">Rspamd docs</a>
   - Ein Name wird automatisch generiert. Beispielinhalte zur Einsicht stehen nachstehend bereit.';
-  
+
 $lang['admin']['no_new_rows'] = 'Keine weiteren Zeilen vorhanden';
 $lang['admin']['additional_rows'] = ' zusätzliche Zeilen geladen'; // parses to 'n additional rows were added'
 $lang['admin']['private_key'] = 'Private Key';
@@ -793,6 +793,13 @@ $lang['debug']['solr_last_modified'] = 'Zuletzt geändert';
 $lang['debug']['solr_size'] = 'Größe';
 $lang['debug']['solr_docs'] = 'Dokumente';
 
+$lang['debug']['disk_usage'] = 'Festplattenauslastung';
+$lang['debug']['containers_info'] = "Container-Informationen";
+
+$lang['debug']['disk_space'] = "Verfügbarer Speicherplatz:";
+$lang['debug']['disk_used'] = "Von Mailboxen belegter Speicherplatz:";
+$lang['debug']['total_quota'] = "Zugewiesener Domain-Speicherplatz:";
+
 $lang['quarantine']['release_body'] = "Die ursprüngliche Nachricht wurde als EML-Datei im Anhang hinterlegt.";
 $lang['danger']['release_send_failed'] = "Die Nachricht konnte nicht versendet werden: %s";
 $lang['quarantine']['release_subject'] = "Potentiell schädliche Nachricht aus Quarantäne: %s";
diff --git a/data/web/lang/lang.en.php b/data/web/lang/lang.en.php
index 795e531c..23fff3fb 100644
--- a/data/web/lang/lang.en.php
+++ b/data/web/lang/lang.en.php
@@ -822,6 +822,10 @@ $lang['debug']['disk_usage'] = 'Disk usage';
 $lang['debug']['containers_info'] = "Container information";
 $lang['debug']['restart_container'] = 'Restart';
 
+$lang['debug']['disk_space'] = "Available disk space:";
+$lang['debug']['disk_used'] = "Disk space occupied by mailboxes:";
+$lang['debug']['total_quota'] = "Total amount of assigned domain quota:";
+
 $lang['quarantine']['release_body'] = "We have attached your message as eml file to this message.";
 $lang['danger']['release_send_failed'] = "Message could not be released: %s";
 $lang['quarantine']['release_subject'] = "Potentially damaging quarantine item %s";
@@ -917,4 +921,3 @@ $lang['mailbox']['alias_domain_backupmx'] = 'Alias domain inactive for relay dom
 
 $lang['danger']['extra_acl_invalid'] = 'External sender address "%s" is invalid';
 $lang['danger']['extra_acl_invalid_domain'] = 'External sender "%s" uses an invalid domain';
-