Time machine slow - OS Catalina
Recently updated my Mac to Catalina. Just plugged in my Time Machine external drive to back up my Mac, and it's painfully slow. Was stuck on 'Freeing up Space' for ever. After a while I clicked Enter Time Machine, and now it's changed from being stuck on 'Freeing up Space' to stuck on 'Stopping...'.
Can anyone help / advise?
Thanks
iMac 21.5", macOS 10.15