Updated sync 3.4 build 20021 to new build version fail

[F150Chief]

@Steven

Now I try to update Sync 3 to build 20282, and it stuck at [“Updating system software”], I reference Sync 3 stuck at “Updating system software” to delete Gracenotes, the free space is larger than 1.5 GB as below

Read this tutorial for reference if you have not yet…manually downgrade the unit to 3.3.19052 and reformat from there.

Tutorial: Sync 3.4 NON-NAV APIM: Failure to Update to Newer Version Sync 3.4 - Ford / Guides & Info - CyanLabs Official Community