440 mega bytes
NO, a PSP's memory stick is a memory stick pro duo. A dsi's is a sanDisk
You need an SD memory card.
no.
256mb
If you format your dsi everything will erase from your dsi including ur things from your memory card.
It doesn't 'need' a memory card (Memory Stick is a Sony card, the DSi uses SD cards), you can play games without using one. A memory card would be for storing lots of photographs, MP3s or DSi store games.
nope psp takes memory stick pro duos, dsi takes sd cards :)
Yes, the DSi (and XL) use the same memory cards as the Wii does.
Only when you have filled up the DSi's 256mb internal memory
Any SD card works. It depends on the store and how much memory. Simply look it up on the store websites. More memory equals more money.
No, but it helps if you want to store a lot of media because the DSi only has a limited amount of space. But music can ONLY be stored it on a SD card and NOT the DSi's memory.