error 0x8007017B
Apple, your approach can be bewildering at times with its unnecessary complexities and flawed designs. Here's a solution for error 0x8007017B when dealing with iCloud Photos:
1. Select the file/s you want to manage.
2. Right-click and uncheck “Always keep on this device.”
3. Wait for the green check status (always on device) to turn white (currently on this device).
4. Now you can move or delete the file locally. It will remain on the cloud and other devices.
For cloud deletion:
A. Repeat steps 1-3.
B. Right-click the files again, select ‘Free up space’
C. Wait for the white check status (currently available on this device) to turn into a cloud (indicating file available on cloud).
D. Now you can delete, removing it from the cloud and all devices.
Enjoy