Hi,
I am sure it was discussed here in the past, but I could not find it.

I attach the phone to USB and select MTP (file transfer), It shows up as
camera in konqueror and I can not copy files to the device "Creating
folders is not supported with protocol camera.".

kernel is 4.19.149 if it matters. In dmesg it says "Attached scsi generic
sg2 type 0" but after this "Power-on or device reset occurred" and "USB
disconnect, device number 21":

[Wed Oct 28 09:26:38 2020] usb-storage 2-1.3:1.0: USB Mass Storage device
detected
[Wed Oct 28 09:26:38 2020] scsi host6: usb-storage 2-1.3:1.0
[Wed Oct 28 09:26:39 2020] scsi 6:0:0:0: Direct-Access     Linux    File-CD
Gadget   0310 PQ: 0 ANSI: 2
[Wed Oct 28 09:26:39 2020] sd 6:0:0:0: Attached scsi generic sg2 type 0
[Wed Oct 28 09:26:39 2020] sd 6:0:0:0: Power-on or device reset occurred
[Wed Oct 28 09:26:39 2020] sd 6:0:0:0: [sdb] Attached SCSI removable disk
[Wed Oct 28 09:26:40 2020] usb 2-1.3: USB disconnect, device number 21
[Wed Oct 28 09:26:42 2020] usb 2-1.3: new high-speed USB device number 22
using ehci-pci
[Wed Oct 28 09:26:42 2020] usb 2-1.3: New USB device found, idVendor=05c6,
idProduct=0a07, bcdDevice= 3.10
[Wed Oct 28 09:26:42 2020] usb 2-1.3: New USB device strings: Mfr=1,
Product=2, SerialNumber=3
[Wed Oct 28 09:26:42 2020] usb 2-1.3: Product: Xperia X
[Wed Oct 28 09:26:42 2020] usb 2-1.3: Manufacturer: Sony

Do you have any idea? I am sure it was working before, but I do not know
when ... might be long time ago as I usually copy from the device to the
PC.

thanks