Azcopy binary is not available officially for FreeBSD. cem@ proposed a patch 1,2 and you can already build and test it. All features were not tested, please use it at your own risk.
Fetch repository and patch from PR 768
cd /tmp git clone https://github.com/Azure/azure-storage-azcopy cd azure-storage-azcopy git fetch origin pull/768/head:cem/add_freebsd git checkout cem/add_freebsd
go build -v -buildmode=exe -ldflags=-s -o azcopy
Copy azcopy binary to user $HOME/.bin
mkdir ~/bin cp -a azcopy ~/bin
Please, report any issues on 1.
1 - https://github.com/Azure/azure-storage-azcopy/pull/768
2 - https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=242391