SolarSurfer wrote: ↑Fri Jan 26, 2024 2:49 am I found this in the CMDR-DOS documentation:
"
CMDR-DOS uses the industry-standard FAT-32 format. Partitions can be 32MB up to (in theory) 2TB"
which also doesn't really address how much the CX16 can ... address.
Why I'm asking is I want to by an SD card for daily use and experimenting, and all I know for sure is 8GB works, 2GB "probably won't work", and 2TB works "in theory". But 8GB cards are a lot harder to find than, say, 32GB cards. I don't really have any other use for an SD card, so I'd like to buy something cheap, easy, and compatible.
AFAIU, if it uses FAT32, then it seems like an SDHC card should work, since SDHC was originally designed for FAT32. Original SD was the one before SDHC, formatted in FAT12 or FAT16, and SDXC is the one after SDHC, formatted in exFAT.
SDHC cards come in sizes up to 32GB, and the SD Association says that cards that are 32GB should be formatted as FAT32, so if its a 32GB card from a reputable maker, what has been quoted makes it sound like that should be OK.
Note that FAT32 can be formatted up to 2TB, but exFAT is more efficient for drives of that size, so if you have an SDXC card that is 64GB or larger, and it is set up per SD Association Standards, it will be formatted exFAT, so you would have to reformat it to FAT32 to find out if it works.
I would guess that is what the "in theory up to 2TB" means, since a modern 2TB card ought to be formatted exFAT, so it can't be operated as a FAT32 drive until reformatting.
While not yet in common use, the ultra-high capacity SDUC cards are not required to offer SPI mode, so they should be avoided.
