» A few notes about the storage memory of Casio graphic calculators
A few notes about the storage memory of Casio graphic calculators
Posté le 16/07/2020 10:36
Casio recently released new generation of monochrome calculators (fx-9750GIII/fx-9860GIII/Graph 35+EII) which are treated as USB mass storage device as same as fx-CG50 and Graph 90+E in your PC. This was a good news.
However, supposedly a normal USB mass storage device should also be supported by Android devices through USB On-The-Go (OTG) technology, but I can't connect my fx-9750GIII to my Android phone. The message I got was: "The file format of this USB storage is unsupported by Android."
The file system of the storage memory is FAT (be careful, not FAT32
nor NTFS nor ex
FAT as we know), which is surprisingly not supported by Android. Moreover, you cannot format it to FAT32/NTFS/exFAT as it only supports FAT (File System ERROR will be shown and requires you to initialize it). Currently there is no tool to enable FAT support in Android (I can only find NTFS/exFAT tool) since FAT is a very old file format.
Also, the new-gen monochrome calcs has 8MB storage, while fx-CG50 and Graph 90+E has 16MB capacity. I highly suspect that Casio uses FAT12 (the earliest version of FAT which only supports up to 32MB/file) for their storage memory. Therefore, the above-mentioned problem may also occur in fx-CG50 and Graph 90+E even though if they have USB 2.0.
I am a heavy phone user so this matters me a lot.
But whatever, FAT32 supports up to 4GB/file and long file name, and is supported by Android too. Its benefits overwhelm FAT12 completely.