Hi, just received mi Air 12 yesterday. I wanted to keep the original SSD in place and use the secondary SSD (a Samsung 960 EVO) as boot drive.
I followed the tutorial (1 post) but when rebooting there was an error and the usb drive was necessary to boot correctly. I tried to change to Legacy mode, reinstall etc.. but nothing worked. By the way the secured boot is not activable anymore..
So, what I did to solve the issue is to remove the “original” SSD and keep only the NMVE in the device. I re-installed Windows 10 with the same UEFI usb boot stick (Without having activated Windows 10 with the original key.) and it worked flawessly.
Speed test of Samsung 960 EVO (with Samsung Magician and Samsung drivers)
SEQUENTIAL MB/s
Read: 1801
Write: 1569
RANDOM IOPS
Read: 178
Write: 99
The original ssd is not used for the moment. I don’t know if it will still work if I put it back in the device.
voilà
hope this helps!
cheers