Darknets are the only safe option.
Preferably, a darknet that could be linked to through the web at large.
In the meantime, I suggest:
1. Forget .7z, use RAR
2. Spread across multiple hosts
3. Link from only one site
As it is, Audiofile has a lot of holes which have resulted in it falling off Google rankings. Anything you link here alone will be fine.