I have managed a 505 for the better part of 3 years, as well as my wife's 300 lately. I have NEVER ever used the Sony software to manage my collection on my reader. Do yourself a huge favor and use Calibre. The Sony software is garbage. Calibre is (in my opinion) the ONLY software that should be bundled with any reader. I honestly believe that Kovid is virtually singlehandedly responsible for the surge in popularity for ereaders thanks to his hard work with Calibre. You will never think of deep sixing your reader again.