You have 10GB free out of 54GB, so this is a 64GB APIM. Storage is not the issue. Which is good.
Don’t use a portable SSD for this. They have power management and may shut sown or slow down and the installation will fail. You will need a good 64GB USB flash drive.
What version of Sync is on the unit now?
I suspect 3.4.xxx from the storage usage. First thing is to downgrade to 3.3.19052. You can just do that only, then use the reformatter with the 3.4.20196 app, voice, Gracenotes, maps, etc. for you region. This can be done thru the Syn3 Updater, or manually.
While i agree, i have used a portable SSD without issue, although no faster than a standard USB 3.0 flash drive, USB 3.0 is usually faster than USB 2.0 despite the car being USB 2.0 as they use better controllers and flash chips
“I’m also getting the MEM_RR01. I have a 2020 ford transit connect XLT. I bought it new it had no NAV I asked the ford dealer can NAV be added? They told me yes for $900. I asked $900 for you to use a scan tool to enable it in 5mins? he replied yes and no. we will use the scan tool to update and in stall the NAV then we have to enable it, it will take about an hour. I’m just wondering because my Toyota Yaris I was able to reprogram all the computers in it using the dealer software I found on line. If you don’t mind me asking if I was able to find fords software and files needed can I do it myself? He said yes just don’t go with the cheapest clone you can find. Oh so you know what I’m talking about? yes. just to confirm all the hardware is in the car needed to run the NAV, I don’t need to buy any computers for the van? that is correct is what the guy from the ford dealer told me. so getting on the internet I updated 3.4 build 20021 with NAV on a non NAV van. the NAV works but freezes up. I could not get the voice to install, so I want to get rid or the added maps and go back to 3.3. I have tried master resets everything I can think of all I get is MEM_RR01. Please help me.”
As stated by CyanLabs: You can’t upgrade non nav to nav the garage is wrong!
That said, what you did may not be recoverable since you have a 2020 vehicle. The reformatter will not work properly with it and will end up in a black screen due to incompatible drivers. I doubt that you have enough storage left on the APIM to load a downgrade. You can run the APIM Utility to see what the storage you have left. Look at previous post in this thread. Otherwise, talk to your dealer to get the unit repaired or replaced.
I need to clarify something, you can upgrade non nav to nav, all the parts are the same, both non nav and nav APIMS have GPS etc, however they do not have enough storage space for maps, you can technically if you are ROW install a very very small part of the maps and get NAV on a Non NAV unit but this is the only real case where it will work.
This is the amount of storage free: 238MB. If there was a way to delete all the map data you could rescue the unit and reprogram it for the latest software, with NO MAPS. I am not aware of a solution to your problem.