I decided to update to catalina, back up to time machine and then dumped the time machine backup onto a new thunderbolt 3 drive. Catalina seems to run smooth but final cut project runs choppy on the timeline playback and programs like Lightroom and After Effects 2017 load for a long time and then run choppy until some crash. Did I install a new Boot drive wrong? I still have the original mac os on the internal mac drive but booted the new drive by holding OPTION during computer startup. I turned off FileVault and turned T2 chip security off due to the external drive not wanting to boot because of security permission issue. Any advice?