等了这么久，欧洲终于有卖了。买之前想问几个问题。其他功能大部分没问题，问题主要是看书方面。我有不少电子书，大部分是PDF格式。一直以来也在看iPad Review，大部分语焉不详。今天看到一篇，其中有这么几句：

If you email yourself a PDF file, you will be able to open it, but not save it. I don't think that you can even create a folder to dump stuff. Photos from emails can be saved in the "photos" directory, but not elsewhere. Whether it is for security (sandbox) or simplicity reasons, I don't like it. I want a "user" folder that I can organize the way I want, and access it like a USB key - most other devices work that way. In the meantime, I use Memeo Connect Reader (free) and Google Doc files to work around this. It works pretty well, but it's a little more work than just dragging and dropping to a folder.

是真的么？不能有自己的文件夹？我有几百个GB的书，怎么看？本来还想从电脑拷贝几百本路上看。
还有，阅读器对单个pdf文件大小有限制么？有的专业电子书有大于300MB的，要用email上传，传完一本我都得退休了。
有没有人对pdf阅读方面详细介绍一下？