Well, you better ask the server administrator, why the server is failing to upload a file with "No space available on the device".

Anyway, if you want our help:
- Post a full log file.
- Explain how did you check that "the disk space of the external server is not full".

Hello,
I am currently developing and need WinSCP because I don't have the files and they are on an external server.
But today WinSCP gives me an error, "Copy files to the remote side failed.
Download aborted. No space available on the device
" (in French).
However, the disk space of the external server is not full I checked!
Please, help me, it's very annoying.
What can I do about it?