Paul Williams3 wrote:
Thank you for helping. Here is what Terminal put out -
https://discussions.apple.com/content/attachment/c0aab20c-db6a-484c-b7c4-6237388708e8
Well it looks like you have borked something here—
I can say all Volumes share space within a Container without penalty.
You have created multiple Containers (partitons) and / or tried to redo and have lost access to free space.
You maybe best to erase reformat the drive and then restore your data from backup.
Is there is really a reason to partition here...
How to erase your Intel-based Mac - https://support.apple.com/en-us/HT208496
How to reinstall macOS from macOS Recovery - https://support.apple.com/en-us/HT204904
this reference— you can add Volumes on the fly if that suits your desire to isolate your videos...
Add, delete, or erase APFS volumes in Disk Utility on Mac