您如何在线存储/分享您的个人文件？

For photos, I use Flickr. But for other documents...Which web based online application (hosted or to install on your personal web site) do you use for PDF or word files ? If there is a user management it would be also great (for example you decide that some persons, or everyone, can see some of your documents...).For photos, I use Flickr. But for other documen