A few weeks ago, I bought my tablet and copied files from my computer running Ubuntu 12.04. Somehow, I had to delete some of these copied files to free some memory. But upon deletion from my computer, the memory of the (supposed to be) deleted files is still consumed. While the folders and files are already gone, they seem to be still consuming the device capacity. It happens with my memory card too, with a folder ".Trash-9999" when i reinsert it to my phone.
How do I completely rid off the the deleted files from my tablet? How do I do this without formatting the device partition?