I have a Veracrypt container on a USB 2.0 drive (not full-disk encryption).
When I copy a file from my hard-drive (where Ubuntu is installed) to inside the Veracrypt container, the standard copying dialog appears.
However, the files I want to copy haven't begun to be written to the USB until I dismount the Veracrypt container. This sometimes takes a while before I can remove the physical USB safely (moving multiple GBs of content to USB 2.0).
How can I have it write to the disk immediately (or at least sooner) than when I dismount the Veracrypt container?