The card may not format right if you do. Note there are 2 speeds of cards, I think the 900 (I have a 600) takes the same type of slow card only - whihc typically are not available oer 1G. There's a lot of memory space on a 1G - you'd be surprised - unless you are using like all the v-tracks at once. Once you finish a song d/l the files to your computer, and then initialize the card to start anew. If you ever want to go back and work on the original song, you can then d/l from the puter to the 900.