Whats the best, easiest and free method of creating a clone of harddrive?

[pieman109]

As title really, I want to replace my ssd with an M.2 drive and want to clone the ssd which has windows 10 and and a load of other stuff on it to the new M.2 drive.
So..can anyone advise me as to what is the easiest, free, etc method?

Cheers in advance

 

[pieman109]

Marvellous guys, just the info I need, thanks.