Recovery backup topic

Hi guys...
I wanna make a nandroid backup of my device before I flash the new CM11 for my LG P710...
I've just one problem... My sd card hasn't got enough space to make a correct Backup (it's a 2GB space SdCard and the CWM Recovery gives me error)
Does the TWRP Recovery require less free space on SDCard for its nandroid backups?

Thanks a lot guys