Storage Issue (sd card)

REPRODUCIBILITY (% or how often): 100
BUILD ID = OS VERSION (Settings > About product): 4.0.48
HARDWARE (XA2, Xperia 10…): Xperia XZ2c
UI LANGUAGE:English
REGRESSION: (compared to previous public release: Yes, No, ?):

DESCRIPTION:

A few days ago, I suddenly got a bunch of partitions showing up as mounted in /run/media/nemo (/media/sdcard). Screenshot shows info. The only one that is actually a storage device is BB34-0DF6, my sd card. I can unmount with umount command, but it comes back after reboot, and it actually unmounts all of those partitions, which causes issues, (dsp, vendor, etc).
I don’t remember doing anything in particular to cause it, but might have - I’ve definitely messed with things in general. Jist posting here because no response in other category …

PRECONDITIONS:all

STEPS TO REPRODUCE:

EXPECTED RESULT:only sd card should show up

ACTUAL RESULT:many other partitions shown as ‘removable media’

ADDITIONAL INFORMATION:

(Please ALWAYS attach relevant data such as logs, screenshots, etc…)Strange Storage Issue