If you just have worthless trash on your internal memory do as abill_uk suggests or even simplier reformat the partition from Hildon File Manager (HFM).

If you want to save your valuable stuff, which i assume you are trying to do, correct you mounting command. The error message suggests that you put in a space between /home/user and /MyDocs. This might be due to poor readability of this site's fonts.
The mount point of /dev/mmcblk0p1 is /home/user/MyDocs. Try again the last command of the code block above, may be with copy and paste, this tome without the space in the directory to mount the partition to.