motorola one XT1941-3 SD Card issues

[MichelinMatheus]

Plan

Premium

Country

Brazil

Device

motorola one

Operating System

Android Pie (9)

My Question or Issue

So actually I have been getting this issue since my old SAMSUNG Galaxy Grand Prime Duos back in 2016, and each phone I owned after (lenovo Vibe K5, motorola G5 and now motorola one) has been plagued with the same issue. I like listening to music and I use Spotify Premium, so I want to download my playlists in the highest qualify possible to listen while driving or going to/from work. But everytime I download them to the sdcard, in a matter of a few days, the contents in the sdcard dissapear (always used Root Explorer or it's rootless variant) and when I open Spotify, the downloaded songs aren't there anymore. When I go to Configurations, it always says that the sd card got corrupted and that I have to format it. I can't create a folder on the SD Card. My SDcard is a Sandisk Ultra 64GB (Class 10 and all that). Funnily enough, I left the sd on the phone for about two to three months just downloading Youtube and Netflix videos, and it never had any issue. I've decided to install V4A monday, so did all the unlock bootloader process, rooted it then decided to redownload all songs to the sd card, and the issue keeps on giving. Sorry for the long post and my english (I'm brazilian) but does anyone know why does this happen and if there's any fix or work around to it?