Hi. I'm having troubles with my Seagate Free Agent GoFlex 500GB External Hard Drive. I bought it about a year ago and I'm having trouble copying/moving things into my external hard drive. I used Chkdsk on my OS drive and my external hd multiple times and doesn't seem to have a difference. It shows an error that says "Cannot read from the source file or disk". It happens to any file i try to transfer. Any ideas?