SanDisk 400GB Ultra microSDXC UHS-I Memory Card with Adapter - 120MB/s, C10, U1, Full HD, A1, Micro SD Card - SDSQUA4-400G-GN6MA Visit the SanDisk Store 4.7 4.7 out of 5 stars 369,405 ratings
pVg6j. A tool like H2testw will try and fill the entire card with data, then read that data back (Be prepared; for a 1TB card that can take a long time—writing 1TB of data to fill up the card at 83.125MB/s will take 3.3 hours, reading/verifying the data at 90.09MB/s will take another 3.1 hours. Let it run overnight!)
As someone who migrated from a 512GB to a 1TB MicroSD for my Nintendo Switch the Ultra is painfully slow on writes. It took around 3 hours to copy the 470+GB of data. I just bought a Extreme for my Steam Deck that is finally coming tomorrow.64GB vs 256GB for casual and retro gaming. Hey Steam Deck ™ enjoyers, my time has come and I can order my 64GB version. A few months ago, I reserved 64GB version and after couple days my fiancé reserved 256GB (still waiting in queue, should be ready in next 30 days) because after few days I decided that 256GB would be better for our use case.