diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index aa3820c8..bacb8089 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -1544,6 +1544,9 @@
   "syncDropboxStyles": {
     "message": "Dropbox Export"
   },
+  "syncDropboxDeprecated": {
+    "message": "Dropbox import/export is replaced by a more advanced style sync in the options page."
+  },
   "retrieveDropboxSync": {
     "message": "Dropbox Import"
   },
diff --git a/manage.html b/manage.html
index 05903e91..d4717c19 100644
--- a/manage.html
+++ b/manage.html
@@ -383,7 +383,7 @@
 
             <div class="dropdown-content">
               <a href="#" id="file-all-styles" i18n-text="bckpInstStyles"></a>
-              <a href="#" id="sync-dropbox-export" i18n-text="syncDropboxStyles"></a>
+              <a href="#" id="sync-dropbox-export" i18n-text="syncDropboxStyles" i18n-title="syncDropboxDeprecated"></a>
             </div>
           </div>
 
@@ -395,7 +395,7 @@
 
             <div class="dropdown-content">
               <a href="#" id="unfile-all-styles" i18n-text="retrieveBckp"></a>
-              <a href="#" id="sync-dropbox-import" i18n-text="retrieveDropboxSync"></a>
+              <a href="#" id="sync-dropbox-import" i18n-text="retrieveDropboxSync" i18n-title="syncDropboxDeprecated"></a>
             </div>
           </div>
 
diff --git a/manage/manage.css b/manage/manage.css
index da65d2e0..74375b25 100644
--- a/manage/manage.css
+++ b/manage/manage.css
@@ -1302,3 +1302,14 @@ input[id^="manage.newUI"] {
     margin-left: -2px;
   }
 }
+
+/* Deprecated dropbox backup (dropbox-sync) */
+#sync-dropbox-export,
+#sync-dropbox-import {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+#backup-buttons .dropdown-content #sync-dropbox-export:hover,
+#backup-buttons .dropdown-content #sync-dropbox-import:hover {
+  background: transparent;
+}