After a random system crash my rooted LG G3 (D855) fails to boot into android (Android 10, Lineage OS, boot loop). As I have a recent backup on my SD card, I'm trying to restore to that in TWRP (126.96.36.199) but here's the problem - I can't change storage to the SD card where the backup or any other files are - TWRP shows "0MB" both for Internal Storage as well as for Micro SD Card.
I followed some guides suggesting to Wipe and Format data, but nothing seems to help. I never set up any encryption, my lock screen was set to simple swype, no pin, etc.
My SD card, when connected to the PC, works fine, all backups, ROMs etc are still there, but I can't access any of it in TWRP.
I don't care about any data or installed apps, just want to access my SD card in TWRP to run Restore from Backup or at least reinstall ROM.