I searched the threads but didn't find what use you got with the an sd memory card. I looked in the manual and it says its for saving settings, but is that the only stuff the hvx200 use sd memory cards for, i dont need like 1 gig.
It doesn't need to be large at all if its just for user settings/scene files.
I was going to use an old 16Mb card I had but it wasn't recognised. The smallest card I could buy was a 128MB card for 10UKP. Overkill for a couple of line of text really. The guy in the shop gave me strange looks when I kept on asking for something smaller....
I believe there are other uses for the SD card (clip metadata stuff) but I've not got that far yet.
You can find the smaller SD cards cheap on eBay for like $4 a card (with shipping). I bought 2 recently this way after hearing about the fps adjustment trick.