When data cable is connected, below are the options provided:
1. Mass Storage Mode
2. PC Suite Mode

I suggest an addition of a 2 more options:
1. Mass Storage Mode (Internal Storage and MMC)
2. Mass Storage Mode (Internal Storage only)
3. Mass Storage Mode (MMC only)
4. PC Suite Mode


Ofcourse, if no MMC card is present then the original 2 options only will be presented.

Reasoning: There are times when I'm listening to music from my phone, but want to transfer some files to/from Computer. In this case, I can continue listening to music and select either one of the storages which are not being used!