So you’re trying to upload an otherwise harmless file into WordPress, and you keep getting a “Sorry, This File Type Is Not Permitted For Security Reasons” error. Sure you could just upload the file via FTP, but it wouldn’t be attached to anything in the WP database. Now what do you do?
There are probably many ways to solve this, but here is the approach that worked best for my particular use case. I’ll share it here in case it helps someone else too.