Flash Card problem

I bought an 120 mb flash card, and I now have about 90 MB left, but everytime I try to drag a wav. or pgm. file into the card on the computer, it says it cannot create or copy the file. I can no longer write anything to the card on the computer. WTF?

save all your data to pc and them format the card as FAT.
try it then.

exactly

or just format the card on the mpc (back up your data first obv.)

i had a problem like this before and it was answered in this forum it was that u probably dragging everything into the root folder. u need to make individual folders and drop things into these folders instead of the root. Try that and see if it fixes your problem