Documents can be shared in a variety of ways with a space and thus with all participants in the space. Documents that were shared in a space also appear automatically in the accounts of all participants in the documents menu. Changes made by another user (who is authorized to edit documents) to a document will also be also visible for all other participants.
If you want to upload documents directly from a space, this works via the green plus sign when you're in the space.
If you click on it, you have the option to upload it from your computer or you can select documents that are already in your fileee account.
Via the mobile app, you can either add documents from your fileee account or scan a document that you want to share in a space.
In addition, documents can also be shared with a fileeeSpace by opening them in your fileee account. Just use the sharing icon next to the document you want to share, then choose which space to share it with.