Strange one this... I've been using it between PCs and Macs for my current uni work. Anyway, today there was an issue with copying some work on to the drive from the Mac - when I deleted folders the capacity didn't increase. Formating doesn't seem to do any good as it shows it as a 200 MB drive instead of 4 GB. It's a Kingston Datatraveller in my opinion is quite poorly made, so I'm guessing it's time for a new drive. Although if anyone has any ideas, that would be useful. 
