I tried the backup now with SD Copier. Everything was ok. I use a 32 GB scandisk SD card.
When I put the new SDcard in RigPi I noticed a huge difference compared to the original sd card.
The copy is not usable. Very very slow and Raspberry Pi works 20-40 % and slow.
Can I have made any mistakes during format? I used the SD Formatter in Windows 10.
Thanks in advance,
Regards from Loic, SM5VFE