I could import a custom horizon file into /Android/data/com.simulationcurriculum.skysafari7pro/files/Horizon Panoramas/ on android 14 using ZArchiver (ZDevs).
I can use the horizon file with SkySafari 7 Pro on android 15 and 16 updated from android 14.
However I can not import it /Android/data/com.simulationcurriculum.skysafari8pro/files/Horizon Panoramas/ on android 15, 16.
MiXplorer Silver (Hootan Parsa): No
File Manager Plus (File Manager Plus): No
Files by Google (Google LLC): No
ZArchiver (ZDevs): No
android 15 system file manager: read only access
android 16 system file manager: read only access
SkySafari Pro 8 Help
https://userguide.skysafariastronomy.com/app-specific/settings-help/display-options-help/horizon-and-sky-help#importing-your-horizon-with-sd-card
I am not able to import the horizon file with SD card.