NAME
git-annex copy - copy content of files to/from another repository
SYNOPSIS
git annex copy [path ...] [--from=remote|--to=remote]
DESCRIPTION
Copies the content of files from or to another remote.
OPTIONS
--from=remoteUse this option to copy the content of files from the specified remote to the local repository.
Any files that are not available on the remote will be silently skipped.
--to=remoteUse this option to copy the content of files from the local repository to the specified remote.
--jobs=N-JNEnables parallel transfers with up to the specified number of jobs running at once. For example:
-J10--autoRather than copying all files, only copy files that don't yet have the desired number of copies, or that are preferred content of the destination repository. See git-annex-preferred-content(1)
--fastAvoid contacting the remote to check if it has every file when copying --to it.
--forceForce checking the remote for every file when copying --from it.
--allRather than specifying a filename or path to copy, this option can be used to copy all available versions of all files.
This is the default behavior when running git-annex in a bare repository.
--unusedOperate on files found by last run of git-annex unused.
--key=keynameUse this option to move a specified key.
file matching options
The git-annex-matching-options(1) can be used to specify files to copy.
SEE ALSO
git-annex(1)
AUTHOR
Joey Hess id@joeyh.name
Warning: Automatically converted into a man page by mdwn2man. Edit with care.

Hi,
I want to back up all my files including previous versions on an external drive. I’ve tried these two commands – both of them exited instantly without producing any output:
Commenting on a man page is not the right way to report a problem. File a bug report.
FWIW, copy --all works fine in my tests. Of course, there are certianly situations where it copies nothing. Eg, if there are no files with ontents in the repository for it to copy.