Hello, I have found that I am often deleting video files on my Macbook Air (Late 2011 model), despite the fact I know that I don't add junk apps onto my Macbook. I looked up my data storage stats on 'About my Mac' and found something was terribly wrong (see attached). The numbers don't add up. If we add up the numbers, I have only used 88gb of my hard drive, not 210gb as the picture says! Also, I am colourblind but does the 'other' bar seem to be bigger than the others despite the fact it says 'Other: Zero KB'. Helllppp!!!