At the moment all modules like documents, files and tickets are stand-alone.

It would be nice to have a connection in the way - upload a file, integrate that file into documents, integrate documents and/or files into tasks without the need to upload again files. Moreover: when I upload a file regardless in which module it should show up in the files list.

This could reduce redundancy and probable mistakes. I imagine that all files are stored and can be accessed in a central repository at least of the current project or my account (I don't know).

Drawback of my request: I a file is deleted it's deleted directly in all connected modules. To prevent this a list of usage in other modules is required (cross-reference list).