yes, mine is the USB version and last one, so that is why I wanted to do it really

PhilG57 wrote:

I just installed the 2020 update because I was fed up with the ‘new’ M1/A14, A1/A14 and M1/A50 junctions appearing as ‘off road’. The update was very smooth but I had to wait ages after buying the disks until I was going on a 3hr journey! The file copy part of the update took the best part of three hours, but it wasn’t until I’d parked, switched off everything, waited ten minutes, and then restarted the engine, that the update was completed. This was exactly as per the supplied instructions.

Of course by “disks” I meant USB  Potted LR history since 1990:
Mk3 LWB Safari, Defender 90 County, Disco, Disco, FL1, FL1 RHD, FL1 Sport
MY08 TD4 HSE, MY15 TD4 SE Tech