diff --git a/src/apps/dashboard/features/storage/components/StorageListItem.tsx b/src/apps/dashboard/features/storage/components/StorageListItem.tsx
index 5d63b6446..b93696f39 100644
--- a/src/apps/dashboard/features/storage/components/StorageListItem.tsx
+++ b/src/apps/dashboard/features/storage/components/StorageListItem.tsx
@@ -22,8 +22,14 @@ interface StorageListItemProps {
 const calculateUsed = (folder?: FolderStorageDto) => {
     if (typeof folder?.UsedSpace === 'undefined') return 0;
     if (typeof folder.FreeSpace === 'undefined') return 100;
-
-    return folder.UsedSpace / (folder.FreeSpace + folder.UsedSpace) * 100;
+    
+    const totalSpace = folder.FreeSpace + folder.UsedSpace;
+    if (totalSpace === 0) return 0;
+    
+    // Ensure we don't have negative values
+    const usedSpace = Math.max(0, folder.UsedSpace);
+    
+    return Math.min(100, (usedSpace / totalSpace) * 100);
 };
 
 const getStatusColor = (percent: number) => {