I went ahead and recorded my terminal to show proof, but I’ve had this issue previously. Previously, I thought this was something that was fixed in a kernel update but perhaps this MicroSD card expansion card is just not as compatible with cards as a cheap $10 dongle off Amazon is?
Per the following recording, it obviously sees the MicroSD card, however it’s not coming up as a mounted device that I can browse or add stuff to. This issue has been happening for about a month now, and it doesn’t seem to matter which slot the card is in.
https://asciinema.org/a/648741
Also, apologies for the time in between showing lsusb as it seems the slots lock quite tightly and getting a card out, which I don’t do often, takes a bit of effort.
Another terminal recording showing that the same MicroSD card works fine in an Anker USB-C to CF/SD card reader.
https://asciinema.org/a/648744
Hey Alex,
If memory serves me from our previous conversation, this was not something I was able to repro, with me leaning towards the card. I’d need to dig through the previous conversation.
This is a different MicroSD card, as the previous card has died a horrible death of destroyed contacts. This MicroSD card works in the Anker USB-C hub and a OWC USB-C hub that has a MicroSD slot fine, but refuses to mount when using the Framework MicroSD reader…could this be a matter of swapping out the MicroSD expansion card for a different one and trying again?
Going to upgrade to the Fedora 40 beta and try again
I’ve noticed mine being a bit temperamental 
Yep, looks like even on Fedora 40’s most recent updates, another MicroSD card I have is showing up when listing USB devices, however it’s not coming up in Gnome Files:
s31bz@fw13amd:~$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
sda 8:0 1 500G 0 disk
sdb 8:16 1 0B 0 disk
zram0 252:0 0 8G 0 disk [SWAP]
nvme0n1 259:0 0 3.6T 0 disk
├─nvme0n1p1 259:1 0 600M 0 part /boot/efi
├─nvme0n1p2 259:2 0 1G 0 part /boot
└─nvme0n1p3 259:3 0 3.6T 0 part
└─luks-cbe12b19-f1fb-4726-bc93-181d662ebb4f 253:0 0 3.6T 0 crypt /home
/
s31bz@fw13amd:~$ lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 17f6:0860 Unicomp, Inc. Unicomp 10x Kbrd R7_2_w_PS_R7_38
Bus 001 Device 003: ID 27c6:609c Shenzhen Goodix Technology Co.,Ltd. Goodix Fingerprint USB Device
Bus 001 Device 004: ID 8087:0032 Intel Corp. AX210 Bluetooth
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 002: ID 090c:3350 Silicon Motion, Inc. - Taiwan (formerly Feiya Technology Corp.) USB DISK
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 002: ID 32ac:0002 Framework HDMI Expansion Card
Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 007 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 007 Device 002: ID 1e91:de3e Other World Computing USB2.0 Hub
Bus 007 Device 003: ID 0bda:0329 Realtek Semiconductor Corp. USB3.0 Card Reader
Bus 007 Device 004: ID 1a40:0101 Terminus Technology Inc. Hub
Bus 008 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 008 Device 002: ID 1e91:de3e Other World Computing USB3.0 Hub
Bus 008 Device 003: ID 0bda:8153 Realtek Semiconductor Corp. RTL8153 Gigabit Ethernet Adapter
However, the MicroSD card adapter at least lets me dd old cards now:
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