remove a disk from time machine
How to remove a back-up disk from time machine?
MacBook Pro 15″, macOS 10.15
How to remove a back-up disk from time machine?
MacBook Pro 15″, macOS 10.15
Go to the Time Machine preferences panel, click the Options button and then select the drive you wish to remove from TM's backup routine.
Back up your Mac with Time Machine - Apple Support
remove a disk from time machine