Unknown content in new memory card

Question

I just bought a Nokia N70 ME ( inclusive of 1GB memory card )recently, but when i try to transfer some MP3 files into the memory card,there was a msg pop-up stating not enough memory and asking me to delete some data first,it really beats me because after checking the m.card details,it shows that out of the 900++ MB memory,only 64 MB used,so i have four issues here,
1st,the solution to fix the problem mentioned above,
2nd,the way to retrieve all the data/files/folders which used up the 64MB memory and also the way to delete it,if required ( because in my impression, i thought the m.card should be empty since it's a new one ),
3rd, in what circumstances that i'm required to format the m.card?
4rd, the step/setting which can channel the mp3 files directly into the m.card during the transfer via bluetooth ( either from phone to phone or pc to phone ).
Any reply over this matter will be greatly appreciated.

Answer 1

Thank you very much Petrib and John,i just came back from the Nokia outlet,the sales assistant had it all figured out..it's because the accessive messages in the inbox have used up most of the phone memory..this is what she did : go to messaging > new message > options > settings > other > memory in use ( set to the memory card instead of phone memory ). she also added, in order to transfer the multimedia/mp3 files frm the inbox to the m.card,the inbox must have sufficient memory to do the transfer,so she advised me to delete some of the msg in the inbox before the transfer..it works!
she also advised me to install the pc suite n backup all the original folders/files/software in the memory card in case we want to perform the formatting so it will be easier for us to do the re-transfer.