Error to restart my cellphone, the downloaded files was deleted

[zeapaez]

I have a sd memory in my cellphone, and all my music is downloaded in this sd memory, but when I restart my cellphone all files dissapear, the storage path change to internal memory, so I change to sd memory, but the files (songs) was deleted, please check o help

Plan

Free/Premium

Country

Mexico

Device

(Samsung galaxy S9 plus)

My Question or Issue

I have a sd memory in my cellphone, and all my music is downloaded in this sd memory, but when I restart my cellphone all files dissapear, the storage path change to internal memory, so I change to sd memory, but the files (songs) was deleted, please check o help.