diff --git a/src/ui/saves.js b/src/ui/saves.js
index 821a2fb..3a56523 100644
--- a/src/ui/saves.js
+++ b/src/ui/saves.js
@@ -118,7 +118,7 @@ async function saveWorld(slot, quiet) {
     if (!quiet) toast(slot === 'auto' ? 'Autosaved.' : 'World saved.');
     return true;
   } catch (e) {
-    if (!quiet) toast('Could not save. Browser storage is unavailable in this view. Use Export world file instead.');
+    if (!quiet) toast(e && e.name === 'QuotaExceededError' ? 'Could not save. Browser storage is full. Use Export world file to keep this world, then delete old worlds.' : 'Could not save. Browser storage is unavailable in this view. Use Export world file instead.');
     return false;
   } finally { clearTimeout(indicator); if (!--savingCount) $('saving').hidden = true; }
 }