Console or handheld support
Lexar lists it as compatible with portable gaming devices. Valve lists the Steam Deck slot as UHS-I with SDXC support.
Lexar PLAY microSDXC UHS-I 1TB
A card marketed for handheld gaming, with a 1TB option. Its 205MB/s read speed needs Lexar's RW310x reader.
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1TB microSDXC UHS-I card, 205MB/s version
1TB microSDXC UHS-I card, 205MB/s version
What works. What doesn't.
Speed
Rated up to 205MB/s read and 140MB/s write. Lexar says full read speed is achieved only with its RW310x reader, beyond the UHS-I 104MB/s specification.
Capacity limits
Sold in 128GB, 256GB, 512GB and 1TB. All are microSDXC.
Installation
We have not documented setup on Steam Deck for this card.
Read the bigger picture.
Game storageBuying guide
The best microSD card for Steam Deck is about capacity, not speed ratings
Steam Deck's UHS-I slot caps card speed near 104MB/s, so the 180MB/s and 205MB/s ratings on the box do not apply. Here is what to buy instead.