553 Can't open that file: Disk quota exceeded

Okay, I don't want to be 'that guy' who asks YOU to solve my own personal server side problems, but this question is much less than that.

All I am wondering and could really use your help in answering is this question:

Is this error referring to the remote side (where I was trying to PUT a file) - their disk quota? I assume "yes"--it's not referring to my local server, where I'm running WinSCP + this script, is it?

Yes, the error comes from the server.

Thanks for the confirmation, much appreciated. Now I can go scold someone besides myself!
[King Martin?] if so PM me!