Amazon and Samsung have the Samsung PRO Plus 512GB microSDXC UHS-I Memory Card w/ Adapter for $37.99 (regularly $49.99) with Free Shipping for a limited time.

The Samsung PRO Plus + Adapter makes capturing seamless 4K video on compatible phones or drones a breeze. Plus, the expanded storage provides you the freedom to play more high-performance and intensive games on your tablet or gaming device. It features read/write speeds up to 160/120MB/s and is backed by a 10 year limited warranty.