microSD compatibility

Baggywhacker

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Joined
Jul 7, 2022
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2
Does anyone have any advice on whether only certain types of microSD cards are compatible with the deck? I got my 64GB deck yesterday and had a 1TB microSD all ready to go, but got the attached message. The card worked fine in my PC and my camera. I had old 128GB and 64GB cards lying around: the 128GB gave me the same message, but the the 64GB worked fine. So I've ended up with considerably less storage than I'd planned, and I don't want to keep buying and returning 1TB cards if they don't work. :(


IMG_20220706_155515.jpg
 

steveo0209

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Jul 7, 2022
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Hey!

So I've had a look around and it looks like the SD card needs to "meet the UHS-1 speed standard". Maybe the ones you're trying to use don't meet that criterion?
 

Kupfer

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Feb 3, 2022
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155
Welcome on board you two!

After a little search I came across a few threads about the Deck bricking some cards as well. Apparently there can be problems if you select the option to format a second time via the Deck, but probably you have been scammed and have a fake sd-card that tells you on the PC that it has 1tb, but breaks when formatting via the Deck as you can read here. (Did you buy your card for like a really good price, maybe too good to be true?)

Two posts below a user seems to have created a workaround, but in your place I would first try to format the card on the pc with the linked tool from steam user "Zombie".
 

Baggywhacker

New member
Joined
Jul 7, 2022
Messages
2
Welcome on board you two!

After a little search I came across a few threads about the Deck bricking some cards as well. Apparently there can be problems if you select the option to format a second time via the Deck, but probably you have been scammed and have a fake sd-card that tells you on the PC that it has 1tb, but breaks when formatting via the Deck as you can read here. (Did you buy your card for like a really good price, maybe too good to be true?)

Two posts below a user seems to have created a workaround, but in your place I would first try to format the card on the pc with the linked tool from steam user "Zombie".
Ha yes, I DEFINITELY bought it for a too-good-to-be-true price :rolleyes: I specifically got it on Amazon because of their no questions asked returns policy and I had a notion I'd be needing it, but I admit, after putting it in my PC and being told that my external drive had c. 990GB of free space, and then putting it in my camera and being told I now had space for 155,000 pictures, I was feeling pretty pleased with myself.

I assumed that space is space, and the deck would format it as it saw fit, so I have no idea what validation tests are - presumably shorthand for "you've been sold a dud"? Never heard of UHS-1, but if that's a requirement I'll look out for it. I think I also read that the deck can only support A2, so A3 cards are pointless, and again, I'm happy to take that on faith!
 

Kupfer

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Feb 3, 2022
Messages
155
If you still have the 1tb SD card lying around , I would reformat and test it on the PC, whether you can really write it with ~990gb data. If not, the SD-card lies to you and you were fooled :( Then send back in any case, bite the bullet and best buy a SD card in the retail store for a little bit of more money.

Never heard of UHS-1, but if that's a requirement I'll look out for it. I think I also read that the deck can only support A2, so A3 cards are pointless, and again, I'm happy to take that on faith!

What do the interfaces and speed classes mean?​


UHS (Ultra High Speed) is the current interface standard for SD and microSD cards, with specific ratings like UHS-I, UHS-II and UHS-III denoting maximum transfer speeds. UHS-I cards have a max speed of 104MB/s, while UHS-II and UHS-III can reach 312MB/s and 624MB/s respectively.


On the Steam Deck, Valve opted for the UHS-I interface. UHS-II and UHS-III cards are backwards compatible with UHS-I, so you could use them in the Deck, but you’d be limited to UHS-I speeds; as such, theres’s little point in spending more to get the newer interfaces. Besides, game launching and loading times depend on non-sequential read speeds, which normally don’t come close to the advertised maximum sequential speeds anyway.


Another spec you might see printed on microSD cards is the speed class, like U1 or U3. Rather than general maximum speeds, these represent minimum sequential write speeds: U1 is 10MB/s, U3 is 30MB/s. Again, these ratings don’t have any real bearing on how fast your Steam Deck games will load, though it might be worth plumping for a U3 card if you’re using your Deck as a full-on desktop replacement, where faster write speeds will come in handy more often.
-source
 

markipolo

Active member
Joined
May 23, 2022
Messages
154
As far as I can tell, according to some friends over on discord, at the very least, the kind of SD cards that you're supposed to buy could be the ones that are "advertised" like the ones used on Nintendo Switch. Like these below or, at the very least, the SD cards with the fastest transfer rates.

Also, when it comes to tech, I rarely buy prices that are "too good to be true"... cuz they almost always are. 😅
I'm just putting these down here as examples.
microSD-SanDisk-Nintendo-Switch-capacidades.jpg

 
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