m15 R2, how to clone to 2x1TB NVMe drive?

@Ramses jr  Macrium Reflect can do this, and the Free version would be fine for your purposes.  You'd just install it, use its Rescue Media Builder to create bootable Rescue Media, which should include any necessary RAID driver automatically, then boot your PC from that Rescue Media to get your system up and running.  If you have an external hard drive (which you should, since a RAID 0 increases your risk of data loss, so hopefully you're backing up your data), the easiest way to do this would probably be to capture an image backup of your current RAID 0 setup and then restore it onto your new SSDs instead of performing a direct clone from source to target.  So basically:

• Install Macrium Reflect Free
• Create USB Rescue Media and test boot your PC from it.  Go to the Disk Image tab and make sure that it can see your internal RAID 0 properly.
• From there, choose to capture an image backup of your RAID 0 to an external hard drive (or network location, or whatever.)
• When the image backup completes, shut down your PC, remove your current SSDs, and install your new SSDs.
• Set up your new SSDs as a RAID 0 using whatever boot-time application is used for this purpose.  It will probably be Intel Rapid Storage, in which case press whatever key is necessary to access its RAID management interface.
• After you've created a new RAID 0, boot into your Macrium Reflect Rescue Media and restore your image backup onto the new RAID 0.  You might want to adjust partition sizes since you're restoring onto a larger RAID virtual disk than your source.
• After this, restart.  If your PC boots normally, you're finished.  If not, go back into Rescue Media and use the Fix Boot Problems wizard.