Proper way to mount sd card on Redmi Note 9 Pro

Jakub

When the sd card is inserted into phone, it isn't recognized automatically, after mounting it to folder which owner is phablet it isn't possible to change ownership from root back to phablet.
Before the mount:

I mounted the sd card with sudo mount /dev/mmcblk0p1 ~/sd and can access files without problems, but doesn't have write privileges.
After the mount:

When using:

sudo chown phablet sd
sudo chmod 777 sd

Output from chown command:

Nothing happens and folder stays as root with only read privileges.
Is there a way to mount sd card so that it also shows in app External drives and can be accessed without problems for reading and writing? Thanks for all suggestions, I tried many approaches for this and wasn't able to success.

Jakub

Update: When sd card is inserted into USB card reader and formatted in UT and then put back into phone it is recognized without problem and can be accessed and written to. But after reboot it isn't mounted nor recognized when inserted into phone.

nitanmarcel

The sdcard will be properly fixed in the next OTA relase. If you want to test it now you can install the development channel from the settings app

Jakub

@nitanmarcel Thanks, will try that, I was also thinking that maybe adding sd card into fstab file could help, but on the other side I am not sure if that would give me write permissions or it would be the same as if mounting it manually.

nitanmarcel

@jakub Nah, the issue was with udisk udev. And actually I don't recommend it but you can fix the issue in stable and rc too.

sudo mount -o rw,remount /
sudo nano /lib/udev/rules.d/99-android.rules

Replace ENV{UDISKS_SYSTEM}="1" with ENV{UDISKS_SYSTEM}="0"

Save and reboot.

Jakub

@nitanmarcel Looks not that difficult, I have to remember to get it the way it was before the OTA update. Do you have any information when it will be released?