If you try to download from a FileSonic link, you will receive this message:

"All sharing functionality on FileSonic is now disabled. Our service can only be used to upload and retrieve files that you have uploaded personally.

If this file belongs to you, please login to download it directly from your file manager."

So, for those of you who have files hosted on FileSonic that you need, you may be able to retrieve them if you can log in and get them from your file manager. And if you want to share any files, obviously you'll need to find another means.