Disk usage by unknown volume (Macintosh HD - Data)
Hi,
Could anyone please explain how the allocation of space between different 'Macintosh HD' is done? I am using a 2018 Macbook Pro, 256GB, standard system settings, latest OS.
In 'About this mac' > storage, I get the picture that 'Macintosh HD' has plenty of space available. This as opposed to 'Macintosh HD - Data1' and 'Macintosh HD - Data2, which seem to have less (and for some reason always have the same space available):
I have cleaned about 30-40GB of files, after which 'Macintosh HD' showed more space, but the 'Data1' and 'Data2' remained unaffected.
What is even more absurd, is that these 'Data1' and 'Data2' drives 5 minutes ago had only 19GB of room available. Now, I have pasted 20GB of movies from my external HDD into my documents (on the Mac HDD), and for some reason, the 'Data' disks have increased space available from 19GB to now 50GB.
This is not a matter of mere indication, but has operational consequences. 5 minutes ago, I could not import my 20GB movies into iMovie as there was 'no space available'. Even though, as I said, I just removed about 30-40GB of data. Now, after actually having added more files (which should have reduced available space and not the other way round...), it works perfectly fine.
This is the setup in 'Disk Utility':
As you can see, here there is even a third drive 'Macintosh HD - Data', which is not listed in the former window. It seems to occupy 182GB, which does not match the 142GB indicated in the first window. Does anyone understand how this works?
I'd be very grateful for a clarification and suggested approach how to be able to use my free space.
Best regards,
Bart
MacBook Pro 15”, macOS 10.15