Dear Support, Using Thunderbird 68.11.0 (64-bit) on CentOS linux 7.8 I'm trying to send a file of about 460MB via the thunderbird filelink utility. Although smaller (about 70MB) files work well, this one does not upload. I already tried to remove space from the file name, change the extension to .jpg (in case there is a policy against .avi's of which I am not aware: the file in question is a record of a flight simulation run) but to no avail. I also check that there was ample disk space to make a temporary copy of the file if it was so required (file ~460MB ; disc space ~4.5GB). Although I not often transfer such large files, it does happen and therefore it would be nice to be able to do it directly without having to open a web browser. I have already contacted WeTransfer support but they have no support for Thunderbird. Many thanks upfront. Kind regards, F.