File Name Warning & Limitations

File names in the AKD PDMM or PCMM flash storage are case-sensitive and the SD card (FAT16 or FAT32) are not case-sensitive.

Storage	File System	Case-Sensitive
AKD PDMM / PCMM embedded flash	FFS3 (POSIX-like)	Yes
AKD PDMM / PCMM SD card	FAT16 or FAT32	No

For example, two files (MyFile.txt and myfile.txt) can exist in the same directory of the PDMM flash, but cannot exist in the same directory on the PDMM’s SD card. If you copy two files (via backup operation or function) with the same name, but different upper/lower case letters, from the PDMM flash to the SD card, one of the files will be lost. To prevent conflicts and to keep your application compatible across all platforms, use unique filenames and do not rely on case-sensitive filenames.