Trouble with offline songs on SD card

[aurapolo417]

I've tried to download all the songs I have saved in my library and save them to my SD Card but after 30 minutes of the download being finished, the songs are deleted off my phone.

It's weird because the Download notificacion fluctuates between different numbers, for example, it can say 80 out of 300 songs downloaded and then fluctuate to 80 out of 600 in 1 second.

I've also checked in my storage settings and it fluctuates between the gigs used.

I don't know if it's the phone's sd card reader, the OS or the app. I don't think it's the sd card in itself because I've used 2 different cards and they both have the same issue.