Hello. My MacBook erroneously claims that the disc is full. I consequently can’t save larger files or sync Photos anymore. As informed from the Disk Utility, the disc is NOT full - it says, however, that about 200Gb can be deleted. What is that all about? I recently did a complete delete & reinstall of the unit so I know very well how much is on it - and it is NOT full. Hope someone can help. Thanks in advance!