Quote Originally Posted by NoLogin View Post
...- Which version of the navigation software, exactly? iGO NextGen 9.18.27.719974 - Nov 2017 - version 31. January 2018 skin by Pongo
...
- Whether the use of the skin (which)?? No skin
...
This is contradictory

Use clean package from the Forum.
Pre-installed iGO - not original for sure.

Does the device have a separate slot for a GPS card?
Is it definitely android 11?

The question remains how the device's internal memory is defined, as independent storage or as an extension of the system memory.
This is often a problem with such devices.

It is also possible that the modified apk requires a card.