MetalSpark128

These are all switches that can be used with the xcopy command. 
 
/s = Copies folders and subfolders except empty ones
/e = Copies any subfolder, even if it is empty
/y = Overwrites existing files without prompting you
 
https://support.microsoft.com/en-gb/help/289483/switches-that-you-can-use-with-xcopy-and-xcopy32-commands
 
EDIT: also, the * in the command is used as a wildcard, so that command would copy everything from c:\drivename\, including all folders, subfolders, even if they're empty and will overwrite any files in the destination without a prompt. 
 
The switch /s is redundant in this command though, as /e does everything /s does, but also copies empty subfolders. 

Here you go
 
https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/xcopy

https://www.tomshardware.com/reviews/nvidia-geforce-gtx-1060-pascal,4679.html