Mimetype rule them all

I want to aging for my files. What I mean, the file after upload, must be deleted automatically 1 week later.
In able to do it, I try to use tagging and retention. But I cannot coverage all kind of files in one mimetype.
I tried

mimetype matches *


mimetype matches .*

but I get “The given regular expression is invalid” errors

How can I coverage all kind of file?