No. Just no. Don't copy-paste your C: drive. That's not how Windows works, and it hasn't been since like… forever.
If you try that, you're basically asking your PC to boot into spiritual confusion.
What you actually do (since this comes up daily)
You clone the drive. Not "drag files like it's a USB stick from 2006".
Cloning = copy the entire disk properly:
bootloader
partitions
registry nonsense
all the stuff you don't see but 100% breaks when missing
Tools (pick one, don't overthink it)
Partition Assistant(easy mode for humans)
AOMEI Backupper(Samsung/WD/etc., also fine)
They all do the same thing. Don't get analysis paralysis over it.