@fresichneideruff, I'm really glad you solved this, because this was close to being a one of the unsolvable problems

"This is not possible" > what is not possible?
@WujTomfirstly, thanks for participation on TTS files update, appreciate it!
My quick check: were you using the latest
EN TTS file? If so, then definitely update the version to the latest "8" in the head of the file!
@frabenHi, I'm checking speed of IGN servers and in my case, app downloaded 500MB/hour, so it should be 4 hours in your case. Not sure where was problem. Slow internet connection? Temporary slowdown on the IGN server? Hard to say, sorry. Btw. did you tried any vector maps like LoMaps, OpenAndroMaps and or any other? It may save you a lot of space and time ...
@Viajero PerdidoHmm this happens on your Blackview with Android 9?