it is taken from I want to split one MicroSD card into two parts: part adoptable storage, and part normal storage. How can I do this?
what is 80 at the end? 80%?
I ran that on an Adoptable Storage card and it erased many installed programs :/ lesson learned https://www.reddit.com/r/MotoG/comments/g7n3ye/fyi_do_you_want_to_expand_your_internal_storage/