Well the messages I receive through Bluetooth seem to be saved on phone memory so like, everytime I wanna save it on the memory card, I'll need the same amount of free space on phone memory as the file, and you know, N70's phone memory isn't that huge, I've only got 18mb free left, that means 9mb is the maximum file size I can receive and store. Is there a way to switch the message memory to the memory card? Thanks.

And also, how do I save .avi stuff? When I open it, it opens SmartMovie and I don't see any saving options.

Change the memory in use for messages to MMC. The avi files can be saved with FExplorer. Search on each drive for *.avi then go to path ant cut the file from there and move it anywhere you like. Remember to delete the message after.