Hi Paul,
I've tried 3 SSD drives that all work fine for any other Library. I've even tried to install to the sytem drives of my iMac Pro and my iMac 5k. I'm not using the 5k anymore, so I guess I'll leave it on around the clock until the Synchron strings finally install, then copy the folders to an external SSD and hook that up to the iMac Pro. Hopefully, that will work!
Hi DLC,
Unfortunately I don't know WHAT you have tried, but a good SSD drive should solve this problem.
Best,
Paul