Unlocking the additional space on a fx-CG50AU

[MajesticFalcon35 Profile]

Thats alright. I appreciate the help. Out of curiosity, the error was fixable right (not permanent)? I just want to be sure before trying the same thing on my own calculator .

It was fixable, yes. I can't remember how I fixed it, but it was super easy to fix.

[TheDyingWind Profile]

Hi again. When you mentioned expanding the storage, how exactly did you format it? On the international model of the calculator, with 16MB of storage partitioned it uses FAT16, but after inspecting it with some file recovery software on my laptop, this variant seems to use FAT12, which has mixed support on android devices, and probably less support overall. When reformatting it, extending the FAT12 partition would probably not work, as I don't believe the format can handle a 16 MB partition, unlike FAT16.

Also, if you remember the specifics on fixing after the error let me know.

Edit: After some research, it seems if you select FAT (not FAT32) as the file system, it will select between FAT12 and FAT16 depending on partition size, so if you expanded the partition, using FAT it should choose FAT16, which is necessary.

[TheDyingWind Profile]

After conducting some research it seems that the FX-CG50AU uses FAT12 in its 4.5MB partition instead of FAT16, as is with the 16 MB international variants. When you were formatting in Windows Disk Management, did you select FAT32 or FAT as the file system? The latter seems to automatically decide between FAT12 and FAT16 depending on the size of the partition, which makes sense as the maximum FAT12 size is the minimum FAT16 size. It's also worth noting that the minimum allocation unit size (or cluster size) I could find when formatting was 8192 which I think means 8 KB, but the Casio filesystem uses 4KB. It's still a long shot, but the next step might be finding some more powerful partitioning software, to allow for 4KB clusters.

Oh, by the way, let me know if you figure out exactly how to fix the error.

Thanks!