Henni,
this is from the PA50SD manual.
SUPPORTED CARDS
You can use the following types of cards to save or load data
to and from the Pa50SDs internal memory:
SD (High Speed, Ultra II, SDHC)
MMC
MicroSD with an SD adapter
MiniSD with an SD adapter
Note: Before you can use the SD/MMC card, you must format it on
the Pa50SD. Dont use your computer or digital camera to format
(initialize) a card you plan to use with the Pa50SD. If the card was
formatted on a different device, it may not work correctly with the
Pa50SD
Note: The SD/MMC card is not included. It must be purchased
separately.
Note: The Pa50SD supports SD cards with a power supply voltage
of 2.73.6V"
Hope it helps.
Deane