Phone model: galaxy mini s5570
ROM: cyanogenmod-7.2.0-rc2-tass /rooted

I have question about security:

The phone was used to send an audio file to another android phone via bluetooth.
Before sending, there was a pairing process with code confirmation (compare & confirm.)

The question is, can the other data on the galaxy mini's SD card be leaked in any way by the person who received the audio file during the bluetooth (paired) connection which was on for about 2 minutes.

Short: I selected the audio file -> Share -> Bluetooth -> Paired with him (compared code) -> He received -> I disabled bluetooth after 2-3 minutes.

I know that this sounds silly, however the data on that SD card is confidential, connected with legal cases.

Thank you very much,
Best regards