Hacking 3DS SD compatibility chart for CFW

taggart6 · Jun 5, 2016

I've noticed that my sandisk 64gb class 10 sd card is 20x slower then my PNY 64gb class 10 card in my n3ds with a9lh running Luma3ds on sysnand

Reformatting and sector repairs did nothing to resolve this. My guess is that some sd cards muct be inherently more 3ds friendly

Is that any online resource showing compatibility information? If not, would people care to post there personal experiences?

Rasa39 · Jun 5, 2016

Nintendo recommend you use SanDisk SD cards. I was tempted to buy one but you'll always be limited by Nintendo's servers and install methods for stuff like downloading games etc.
Having not used a Sandisk card I'm surprised to here yours is running slow.

I don't think there's any kind of compatibility guide, but people have reported (in several threads) that buying a higher quality/more expensive card didn't really give them that noticeable a difference in performance. (the mSD reader is probably only 2.0)

Do you lag on the home menu and stuff, or is it just slow downloads and transfer speeds? I have a Qumox 64GB mSD, which works great considering it's price and how unfamiliar the brand is. Installing my games from the eshop or from cia still runs very slowly, but I noticed that when I use my ticket.db and download from the homebrew freeshop I get much higher speeds.

Also this may be a given but did you format each card with the same cluster size and on a full format? Not sure if that would do anything for you though, but there's no harm checking.

taggart6 · Jun 5, 2016

No lag int eh operations, but writes to the sandiisk card are horrible. no idea whats going on unless its physically damaged some how

Sonansune · Jun 5, 2016

taggart6 said:
No lag int eh operations, but writes to the sandiisk card are horrible. no idea whats going on unless its physically damaged some how

3ds has a really limited i/o speed on the sd slot

taggart6 · Jun 6, 2016

Ericjwg said:
3ds has a really limited i/o speed on the sd slot

Nahh, this is even for writes using my PC's internal sd reader. I get 50mb on most other class 10 chips.

The Catboy · Jun 6, 2016

Did you try reformatting with emunand9? Mine was running slow and using that actually sped it up.

Sonansune · Jun 6, 2016

taggart6 said:
Nahh, this is even for writes using my PC's internal sd reader. I get 50mb on most other class 10 chips.

what????? you got 50megabytes/s writing speed on c10 card???

Deleted User · Jun 6, 2016

I use a 32gb class 10 Sandisk one and it works extremely well in my N3DSXL.
I also get around 65mb/s when writing to it using my pc

Sonansune · Jun 6, 2016

GamerDudeK said:
I use a 32gb class 10 Sandisk one and it works extremely well in my N3DSXL.
I also get around 65mb/s when writing to it using my pc

waht???????? which card reader you're using???????

mokmoki · Jun 6, 2016

taggart6 said:
Nahh, this is even for writes using my PC's internal sd reader. I get 50mb on most other class 10 chips.

i have one Sandisk Ultra 64gb mSD card that has slow writes as well. but my other Sandisk cards write quicker. i'm thinking i just pulled a bad one from the bunch. so i just ordered a Samsung Evo+ and put NDS roms on my slow Sandisk. (64gb is way too overkill though for DS roms).

Deleted User · Jun 6, 2016

@Ericjwg
An Anker USB 3.0 SD/Micro SD card reader

Sonansune · Jun 6, 2016

GamerDudeK said:
@Ericjwg
An Anker USB 3.0 SD/Micro SD card reader

looking this one on amazon right now

, thanks!!!!

--------------------- MERGED ---------------------------

GamerDudeK said:
@Ericjwg
An Anker USB 3.0 SD/Micro SD card reader

the 15.99 one?

taggart6 · Jun 6, 2016

Ericjwg said:
what????? you got 50megabytes/s writing speed on c10 card???

Ahh no...on the read. The write was at 5 to 11 most of the time bit I've gotten 20 as well. It's an internal sd reader but into my work laptop.

Sonic Angel Knight · Jun 6, 2016

Nintendo 3DS / Nintendo 3DS XL / Nintendo 2DS
New Nintendo 3DS / New Nintendo 3DS XL

hunter010709 · Jun 6, 2016

Megabyte (MB) and a Megabit (Mb). Mb being 1/8 of MB, so 1MB takes 8 seconds if the speed 1mb/s.

From memory the class of an 03ds sd slot is 4, n3ds sd slot is 10 (no uhs). That is your limit on the 3ds device regardless of the sd being higher, however copying files from a pc to the card i.e large cia's will be faster if the pc has the capability.

trinhno · Jun 6, 2016

Class 10 SD cards by standard only need to sustain 10MBytes/s writes.
SanDisk Ultra 48MB/s, their lowest class 10 cards usually have ~15MBytes/s writes. I have a golden sample with ~40MB/s writes, but that's hard to come by.

More expensive cards, even Sandisk ones will have better speeds. It'll help you with installation and a bit of boot speed.

Hacking 3DS SD compatibility chart for CFW

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