Amazon Basic Micro SD 512 GB. I have just bought it for my Steam Deck because Sandisk cards prices rose and this card was on offer. It has solid writing speed in
Amazon.com: SAMSUNG EVO Select Micro SD Memory Card with Adapter, 512GB microSDXC UHS-I U3 100MB/s Full HD & 4K UHD for Photos, Videos, Music Storage, MB-ME512HA : Electronics