I tried to update using Fords Sync My Ride, it only offered F9 maps and an older version of 3.4.
The sync software installed but had no radio logos and after 12 attempts at getting the F9 maps to install I gave up and went for the Cyanlabs solution. I installed maps only first then 3.4 keeping existing maps. My plan was to only install the F10 maps, but as that went smoothly I went for it 
If you follow instructions properly it usually goes well 
shame some people just rush in 
I installed the gracenotes file and everything went fine. I tried to install the nav voice files that i left out when i installed the F10 maps (with ci version) and i have mem error. The log if i understand it correct has 12g free and nav voice files are about 8g. Is ther somthing i miss?
<d2p1:PartitionHealth type="/fs/sd/MAP/" total="1.1G" available="892K"/>
<d2p1:PartitionHealth type="/fs/sd/MAP/" total="2.8G" available="14M"/>
<d2p1:PartitionHealth type="/fs/sd/MAP/" total="2.3G" available="14M"/>
<d2p1:PartitionHealth type="/fs/sd/MAP/" total="1.5G" available="7.9M"/>
<d2p1:PartitionHealth type="/fs/sd/MAP/" total="2.2G" available="17M"/>
<d2p1:PartitionHealth type="/fs/sd/MAP/" total="3.7G" available="24M"/>
<d2p1:PartitionHealth type="/fs/sd/MAP/" total="38M" available="396K"/>
<d2p1:PartitionHealth type="/fs/sd/MAP/" total="3.2G" available="8.4M"/>
<d2p1:PartitionHealth type="/fs/sd/MAP/" total="3.1G" available="24M"/>
<d2p1:PartitionHealth type="/fs/Nuance/" total="4.4G" available="26M"/>
<d2p1:PartitionHealth type="/fs/Nuance/" total="4.6G" available="27M"/>
<d2p1:PartitionHealth type="/fs/Nuance/" total="4.1G" available="24M"/>
<d2p1:PartitionHealth type="/fs/Nuance/" total="3.4G" available="33M"/>
<d2p1:PartitionHealth type="/fs/Nuance/" total="1.9G" available="8.4M"/>
<d2p1:PartitionHealth type="/fs/Nuance/grace" total="1003M" available="21M"/>
<d2p1:PartitionHealth type="/fs/rwdata/" total="1.2G" available="818M"/>
<d2p1:PartitionHealth type="/fs/rwdata/quip/" total="35M" available="13M"/>
<d2p1:PartitionHealth type="/fs/rwdata/quip/" total="90M" available="71M"/>
<d2p1:PartitionHealth type="/fs/mp/" total="1.4G" available="133M"/>
<d2p1:PartitionHealth type="/fs/mp/resources" total="73M" available="432K"/>
<d2p1:PartitionHealth type="/fs/images/" total="54G" available="12G"/>Interesting about the log - I’ve used the same USB thumb drive for all installs on my 2020. It’s a 32GB USB 3.0 drive, formatted ExFAT. Thanks again for your guidance!
Please use this thread from now on, My20 NA AutoInstall Discussion - Syn3Updater