All in one design, a memory card slots that supports 5 digital memory cards listed below:
SD Card = Secure DigitalMini SD card
[MiniSD = Mini Secure Digital]-[when used with SD adaptor]
Multi Media Card = MMC
RS Multi Media Card [Reduced Size MMC] -[when used with SD adaptor] T-Flash card = TransFlash [with SD adapter]
This can be used as a flash disk [i.e. a pen drive] with any of the above memory cards. Without a memory card it obviously has NO capacity.
Note:
For Mini SD/Rs MMC/T-Flash, it needs an adapter to fit in the slot, but normally if you buy SD/Rs MMC/T-Flash memory cards, these memory card come with an adapter, make sure you get the adapter when you buy these memory cards.