I am on trying to archive a directory (a Time Machine backup) using:
tar -czf /Volumes/My\ Drive/archive.tar.gz my_directory
The archive process is going on at the moment. I am monitoring the archive process. The entire HDD has 167GB used space, the size of directory I am trying to archive is 160GB. But the archive has already gone up to 170GB now.
I am not sure why gzipped archive size is going bigger than the actual drive size, let alone the directory size that I am trying to archive.
I am using MacOS 10.13.