Same here. Beach ball of death repeatedly during the simplest tasks.  It's often impossible to move a file between two Finder windows! Fix it, Apple Corp! This is the worst quality issue that I've experienced during twenty years as a Mac user. Mac OS 11.2.3 iMac (Retina 4K, 2019) 3 GHz 6-core Interl Core i5 8 GB 2667 MHz DDR4 Graphics Radeon Pro 560X 4 GB