An inserted memory card is recognised by the LG smartphone by default and made available directly. No further action is required.

However, if a memory card has been ejected, it will have to be reloaded manually.

Android 9 | LG UX 9.0
Mount -  Open the  Settings
Mount -  Tap on  General
Mount -  Tap on  Storage
Mount -  Tap on  SD card
Mount -  Tap on  Mount
  1. Open the Settings
  2. Tap on General
  3. Tap on Storage
  4. Tap on SD card
  5. Tap on Mount

LG Instructions