FTP / File Manager problems

Hi there, trying to upload FTP files to my site, they transfer through and show up as in the directory, but once the directory refreshes they are not there. Tried this with both an FTP client and the online file manager.

I’m assuming this is not a ‘feature’ - can i please get an answer/help on this.

The file i’m trying to upload in this instance is a html verification file for zoho mail.