How to make new partition on SD for media files ?

[kbarb]

I installed Xbian to a 16GB SD card and have it running w/o any problems. Very nice and thanks a lot for all the work that went into it.

So I'm used to placing my home folder, or at least just a folder for my media files in a separate partition.
Usually it makes backup and reinstalling the OS (if necessary) easier.
(Eventually all the media will be on a NAS, but right now I want to put them on the SD card.)

So what would be the recommended final partition format and method to accomplish this ?
I see we're using btrfs - something a bit new to me although I have all the links and have read a lot of pages for dealing with it.

Should I :

1. Shrink the existing btrfs partition to something smaller, then make another partition, formatted w/ btrfs ?
2. Shrink the partition to something smaller, then make another partition, formatted w/ EXT4 or NFS?
3. Another option I've read is to reinstall, and add "noresizesd" to the cmdline.txt, then format w/ one of the above.
4. Something else ?
   

I'm trying to do something that will be fairly manageable later on w/ common partitioning , ftp, and backup tools, although I don't mind some CLI configuring just to get it setup in the beginning.

Any thoughts ?