Cannot copy .uf2 file to Crazyradio2

[oOK1Oo]

I'm trying to flash the crazyradio2-CRPA-emulation-1.1.uf2 file to my Crazyradio2, but I'm getting an error.

System info:
OS: Ubuntu 22.04 / 24.04 (or specify)
File manager: GNOME / Nautilus
Device: Crazyradio2

What I did:
Downloaded crazyradio2-CRPA-emulation-1.1.uf2
Plugged in Crazyradio2 (it mounted as a USB mass storage device)
Tried copying the .uf2 file to it

What happened:
Got an error:

Additional info:
I verified the device is mounted
The file seems to be missing from the source folder
I've already set udev permissions
Please advise whether this is a user error or a software problem

[ataffanel]

Hi,

1. What version of Ubuntu are you using, you did not specify exactly.
2. How are you copying the file, are you drag-and-dropping from the UI?
3. Can you read the files that are in the Crazyradio2 drive?