You can change the default location of the Inbox to be the memory card instead of the phone memory. That way all your messages (including files sent over Bluetooth) are stored automatically in the memory card.
The setting is located in Messages -> Options -> Other -> Used memory (rough translation, my S60 phone is in Finnish :-) )
Not exactly the most elegant solution, but still a workaround, if you need to do such transfers often through Bluetooth.
Inbox in the memory card
You can change the default location of the Inbox to be the memory card instead of the phone memory. That way all your messages (including files sent over Bluetooth) are stored automatically in the memory card.
The setting is located in Messages -> Options -> Other -> Used memory (rough translation, my S60 phone is in Finnish :-) )
Not exactly the most elegant solution, but still a workaround, if you need to do such transfers often through Bluetooth.