Your rootfs is mounted on / and in your df output is shown as having 227.9MB of total size. That's not 2GB. /opt is actually in /home and has the additional 2GB for packages from Extras and the remainder of the 32GB built-in MMC is on /home/user/MyDocs. So it wasn't quite what you'd described earlier, but I can see why you'd perhaps describe it that way. The fact remains though, that the rootfs is quite small and we need 'care in the community' to ensure that it doesn't get filled up.