[[!comment format=mdwn
 username="joey"
 subject="""comment 1"""
 date="2018-11-28T15:33:57Z"
 content="""
Well, git-annex will avoid copying files to the drive once it's full, so
you don't really need to tell it the size of the drive.

It seems to me that your command would work without any new --limit option.
"""]]
