Google rejected my request to get all file access.

[fmcpma]

Exactly. That's what I'm saying: Google gives some e-book reader all file access (which it doesn't need, since MD, with media access only, is able to read and write any file type, even if only in directories manually selected by the user in a dialogue, and therefore so could this reader – and such method would be appropriate for the reader) but denies it to MD, which does need it. With all file access MD would be able to fully manipulate files as Tasker does.