I have discovered that the latest BMW software on my MS906 is forcibly installed on the SD card and NOT on the internal memory !
If you have NO sd in your system the install fails without any information. If have an sd you get at the end of the install the information that this 3 GB have been installed on the SD and that waht directories you can delete from the internal memory.
So be aware that you need and SD card and you get a SCAN folder there that is needed from now on.
Bad idea, as I have about 12 GB free and I see no need to go to SD for BMW software....
Maybe you can dedicate the largest SD card that will work in that slot and double the storage space leave it in the slot just like a DS708, and could still use a USB card reader for transferring data and files to another SD card in a card reader now instead of the dedicated SD card slot that now seems to be getting relegated for dedicated storage of the car software.