How Guest Can Upload Files to Your Google Docs

How do you let other people upload files directly to your Google Docs account?
One option is that you create a shared folder (or collection) in Google Docs and invite all the other people, who you want to collaborate with, as “editors” (i.e., set the sharing setting for them as “Can Edit”). Now these editors can easily add new files to your Google Docs folder but a drawback is that they can also view (and even remove) files that have been uploaded by others in the folder.
In some cases

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