Out of Space error

After 4 GB of data downloaded from an FTP site, WinSCP aborts with "out of space" error. Download was to a Veracrypt container of 25GB. I checked the used and available space on the container after the abort, and there were 4GB used and 21 GB available.

I'm not developer of WSCP, but I read your post... I'd like to thanks for pointing VeraCrypt, looks a great replacement for the dead TrueCrypt!

I see version 1.11-BETA has a fix described as "Make volumes correctly report Physical Sector size to Windows". Maybe, will it fix your problem?
Download at https://sourceforge.net/projects/veracrypt/files/

Can you reproduce the problem when downloading a file to a normal volume?