Downloading Sync 3 update with Nav in a car without Nav

Ford SYNC 3 Support
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You have a NON-NAV unit. You don’t have enough storage for all those files. Read this tutorial, it will explain what the issue is. It applies even though you are on 3.3…you need to only update the app, voice and dab files. I doubt you can fit GN.

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

You can modify the autoinstall.lst file:

AUTOINSTALL.LST
; CyanLabs Syn3Updater 2.10.1.0 Stable - Autoinstall Mode - Sync 3.4.20282 EU

[SYNCGen3.0_ALL_PRODUCT]
Item1 = ENH_DAB - 1U5T-14G658-AF_1598633324000.TAR.GZ
Open1 = SyncMyRide\1U5T-14G658-AF_1598633324000.TAR.GZ
Item2 = VOICE - 5U5T-14G391-AM_1598633466000.TAR.GZ
Open2 = SyncMyRide\5U5T-14G391-AM_1598633466000.TAR.GZ
Item3 = APPS - 5U5T-14G381-EK_1606255141000.TAR.GZ
Open3 = SyncMyRide\5U5T-14G381-EK_1606255141000.TAR.GZ
Options = Delay,AutoInstall