New USB SSD on iMac not working
I have chosen a new USB SSD as the startdisk of my iMac. When I boot my iMac I get this error on a black screen "Your computer restarted because of a problem. Press s key or wait a few seconds to continue starting up"
Before all this I erased my new SSD in Disk Utility and I chose the GUID partition and Mac OS X Journaled (extended). Then I restarted and pressed cmd+R. I copied the HDD with all data to the SSD and afterwards changed the startdisk to the SSD and named it SSD. Then I get the error I wrote before. What did I do wrong?
Specs:
The iMac (late 2015)
SSD Samsung T7 500 GB