How much max. size of Micro SD Card Rockbox supports ?

[XUDOOPHIL]

Hi!

Gotten a brandnew XUDOO X3II.
Now with stock firmware i can only use 256GB max.
But as there is already a rockbox port i wonder
how much GB i can throw into the device with rockbox.
May it be even possible to use 512GB with stock firmware somehow ?

Best wishes,
Matthias Braun

[cereal_killer]

As far as I know, Rockbox has no limit of the capacity of SD cards as long as they are formatted to FAT32. I tried a 512GB SDXC card and it worked in my Cowon D2+. Using adapters some people have managed to have 1TB and above. You can't exceed the limit of the OF.

[XUDOOPHIL]

Thank you!
What does OF mean ?

[Chronon]

OF = original firmware

[Prisoner416]

Is there a guide to firmware limitations anywhere?

[Chronon]

You can't exceed the limit of the OF.

Is that for a particular target?  I recall when Rockbox permitted use of microSDHC on the Sansa e2x0, while the original firmware only permitted microSD (with a maximum of 2 GB).

[burkjavier]

I'm not aware of the OF being a limitation that Rockbox cannot break.  Again, only requirement being that FAT32 has to be used.

Example already given on the E200, and I am pretty sure that if I even attempted to use my 256GB SD card on the OF for the Cowon D2+ it would simply fail to load up.  I actually have to pop up the card purposely when I charge the Cowon device.

[Frankenpod]

With flash modded ipods it's now possible to have 2TB of storage (4x512gb microsd), and I'm assuming pretty soon it will be possible to go beyond that if/when larger microsd cards appear (though it wouldn't surprise me if there were some limit to the sdcard spec itself that means it won't go much beyond that).

But is there an upper limit for Rockbox itself (or maybe some other ipod hardware limit that Rockbox can't get around) that would mean even if microsd cards got larger, you couldn't exceed 2TB?  Or is the only limit the FAT32 format (which would mean 16TB was the max)?

[Chronon]

We have already surpassed SD specs a couple of times:
SD: max 2 GB
SDHC: max 32 GiB
SDXC: max 2 TiB

It looks like SDUC will support up to 128 TiB.

[saratoga]

I don't think there is any fundamental limit, although if we stick with fat32 you'd have to partition a card bigger than 16 TB into multiple partitions. 

[cereal_killer]

Is that for a particular target?

I was referring to

May it be even possible to use 512GB with stock firmware somehow ?

Sorry for the confusion.

[Chronon]

Thanks. 

[Clippo-Zippo]

Correct me if I am wrong but afaik FAT32 max partition size is 2TB. So without doing more then one particion this would be your limit. I upgraded my Sansa Clip Zip on a 512 GB microSDXC Samsung Evo Plus (Formated with fat32format - ridgecrop). Filled a bit more then 400GB. Now everything works like a charm and I am happy with my setup. 

[LambdaCalculus]

I don't think there is any fundamental limit, although if we stick with fat32 you'd have to partition a card bigger than 16 TB into multiple partitions.

exFAT is open source, supported by most major OSes, and can theoretically support up to 128PB volumes.

Maybe a switch-over is in order?