How would I go about doing this if I get a SanDisk microSD 8GB card? Someone told me there's a way I can transfer music from my MacBook to my Blackberry.
Go to media card options on your BB and enable mass storage mode and auto enable mass storage mode to on. You should now be able to browse to the microsd on your mac as if it were a usb thumb/storage drive.
You need to sync your blackberry with your itunes library/playlist. If you don't have pocketmac for blackberry, you can download it for free from BB's website. Then just sync your itunes playlist - using your usb cord. ANd then you can browse your music on your BB as stated previously.