ok found it,, with my DOS knowledge i removed the MyDocs dir using "rm -r " command within hildon-welcome.d

now the result for df -h / is
size - 227.9M, used-160M, Available 64.7M, use- 72%
and for du -hsx / is 309.3M

n the detail result

364 k-----/bin
5.4M -----/etc
14.9M----/lib
12K-------/root
1.9M------/sbin
64K-------/tmp
252.4M---/usr
34.3M----/var

everything back to normal or is there more free space i can get?