PC Card = good
CardBus = bad
ExpressCard = bad
The main issue is that the label PC Card was only used after CardBus came out. Before that it was simply referred to as PCMCIA while today PCMCIA refers to any of them. You might have to trust the absence of CardBus and ExpressCard and hope the best.
FAT32 should be ok for either FAT95 or CrossDOS.
