BootMii keeps giving the error code -1 when trying to "prepare SD card"

[oliveboy123]

I have an SDXC card that is 119.08 GB but only has one partition in fat32 with 29.8 GB, I've tried multiple things like making it so theres no unallocated space left and making the partition really small (like 1-4 GB) but I can't find any solutions.
Partition Type: Primary
UUID: 2DC6-29C2
Partition UUID: 3560AE5C-AA94-5744-A406-2AEC6DF19FBC

 

[XFlak]

Is there a lock switch? Confirm it's MBR and not GPT?

 

[CoolMe]

have an SDXC card that is 119.08 GB but only has one partition in fat32 with 29.8 GB,

That doesn't make any sense, format it again with Guiformat and it should set the whole storage capacity & with one partition.

Confirm it's MBR and not GPT?

For the sd card?

 

[XFlak]

I mean 99% it should be MBR, but it's not impossible right? Even if it wasn't sold that way someone definitely could have formatted it improperly

 

[CoolMe]

I mean 99% it should be MBR, but it's not impossible right? Even if it wasn't sold that way someone definitely could have formatted it improperly

Maybe, I'm not sure.. But yeah, better check and make sure it's set correctly.

 

[oliveboy123]

I mean 99% it should be MBR, but it's not impossible right? Even if it wasn't sold that way someone definitely could have formatted it improperly

probably improper formatting since I've used this SD card for a lot of different things and have formatted so many times

 

[CoolMe]

probably improper formatting since I've used this SD card for a lot of different things and have formatted so many times

Yes. Like I said, it should show the whole storage capacity if the sd card ~120GB as one fat32 (32kb clusters) partition. Use Guiformat to format your sd card, since Windows doesn't format +32GB cards as Fat32.
And If you want to make sure about the "MBR" partition thing, use something like AOMEI Partition Assistant to see what it's set to, and change it if it's not correct, and it can format the sd card correctly too, if you want to format it there.

 

[XFlak]

Windows can check natively as well, modmii tells users in its usb loader set up wizard how to check and change/convert

 

[oliveboy123]

IT WORKED!!!!! I checked if it was in GPT and it was; I used MiniTool Partition Wizard because converting GPT to MBR in AOMEI Partition Assistant is locked behind a paywall

 

[XFlak]

Sweet sweet validation, love it, glad it all worked out