alfafile.netは安全ですか？

It's a file hosting site, and I have not encountered anything suspicious. Just use common sense, if what you're downloading is software, make sure that you trust the vendor. Alfafile is merely a host. The only reason to exercise caution in child safety is that any content can be hosted here, uncensored. Again, no different from any other file hosting site.

Alafile is a cloud based storage service. Similar to rapidgator and nitroflare. As with most of these cloud storage sites, uses store files that may be adult in nature and/or copyright infringement. Be cautious when downloading as the shared files maybe adult in nature therefore children should be cautious in downloading files. There are No viruses, adware/ spam o be concerned with. I've used this site for the past 5 years.