If using an external SD card, reformat the card to or FAT32 format directly through the Android 14 device interface to align with the new OS storage boundaries. Community Wisdom from MHH AUTO
Android 14 severely restricts apps from writing data to shared directories. Because X-DIAG and DIAGZONE download massive vehicle brand folders (often exceeding 20GB-50GB) into local storage paths, restricted directory permissions can prevent the app from reading the vehicle databases. Step-by-Step Fixes for Android 14 Issues X-DIAG - X431 - DIAGZONE - Android 14 - MHH AUTO - Page 1
If the standard Android package installer blocks the older, preferred version of your diagnostic app, you can use a PC to force the installation via the Android SDK platform tools. If using an external SD card, reformat the