Same issue here with nightly build Jan 18th 2023 on a Samsung galaxy s21 with android13 and snapdragon 888 cpu.
It sees that I have an sd card mounted and the xXxX-xxxx numbers and letter change as I use different sd cards or external hdd. I’ve tried multiple cards of multiple different sizes and external hdd in multiple formats. Fat32, exfat, ext4. Nothing works. Dig nor any other launcher can launch any games to retroarch even though dig can see the sd cards and files on sd cards and external hdds properly.
NOTE: I am using a usb type c hub/doc with power distribution, usb 3 ports, Ethernet, HDMI and display ports but the phone can see everything perfectly and I can play games through zeta touch off my external hdd. The phone can’t see the sd cards in ext4 format (which I thought was odd since its the phones native format) but in fat32 or exfat depending on sd card or hdd size it works without issue.
Please get this fixed. I really love using retroarch as I’m familiar with it for years now. I really don’t want to have to download each emulator individually from the play store and not have an all in one solution with menus and settings I’m used to.