@vicco
Update: I managed to get it to get past that stage by attempting it fresh after a reboot, but now it's stuck on the "Loading MTP device..." stage. Progress, I suppose?

E: It just took a while, nevermind.
Sadly this feature is less... featured than I had expected it to be. I will probably write a post somewhere else on the forum discussing potential improvements.

@jonas
This does not seem to change anything.... The device is not mounted, I don't have Dolphin open or anything.... I wonder if something with KDE is interfering with it?

I want to be able to sync my music collection to my phone, but I also be able to convert it from FLAC on-the-fly. I thought I could use the "devices" feature from Strawberry, but whenever I try to create a device on my phone, I get this error:

Error connecting MTP device mtp://xiaomi_poco_x3_nfc_978e6e28/?busnum=001&devnum=026

Has anyone had this issue or otherwise got MTP devices to work? The above error is not very descriptive. I can also mention that Clementine displays pretty much the same behavior.

I'm on Arch Linux running strawberry-git and the phone is, as above, a Poco X3.

Somewhat off-topic, I think it'd be amazing to be able to create virtual devices as folders wherever you want, without being tied to MTP or USB mass media. MusicBee does this and I miss that feature a lot, but MB works poorly via wine and Strawberry feels better to me in general.