While using my USB hard drive recently, I just realized that OS X is guilty of some extremely strange behavior when it comes to deleting files. I was at my friend's place when I realized that my USB drive was full. I knew that I would need it later at the office, so I used his Macbook to delete a few GBs of data from my USB drive. Later, when I got to the office, I plug my HD into the computer only to realize that there is no free space. WTF? I thought I just made some free space. To solve my problem, I had to drive all the way back to my friend's place, plug my USB drive back into the same Macbook and then press "empty trash." I couldn't believe that I had to drive all the way back to my friend's house and use that same Macbook just to recover my own HD space. This leaves only two options: 1 I'm really stupid for not seeing a much simpler solution to this problem. 2. Apple is really stupid for not creating a much simpler solution to this problem. So, which one is it?