Communities like the one implied in the name are often banned by Reddit for violating Digital Millennium Copyright Act (DMCA) policies. This leads to a cycle where new "backup" subreddits are created as soon as the old ones are shuttered.
Downloading files with names like this from third-party links is a high-risk activity for malware .
The "(13)" in the filename suggests it is the 13th part of a larger series or a specific item within a massive Mega.nz cloud storage folder. These folders are frequently advertised on subreddits to bypass paywalls.