useful links

udev infos: https://wiki.archlinux.org/index.php/Udev
what is /run/user/: https://unix.stackexchange.com/questions/162900/what-is-this-folder-run-user-1000
what is /run/user/: https://askubuntu.com/questions/842409/what-is-run-user-1000-gvfs

useful commands

display usb devices lsusb
show attaching of new devices dmesg
get attributes of usb device udevadm info --attribute-walk --name=/dev/bus/usb/001/010
monitor changes when plugging devices udevadm monitor --environment --udev
mount device via gio gio mount -d /dev/bus/usb/001/004
unmount device gio mount -u /run/user/1000/gvfs/mtp:host=091e_4b48_0000c4fa0516
reload udev rules without reboot sudo udevadm control --reload-rules && sudo udevadm trigger

idVendor=091e
idProduct=4b48
ATTRS{serial}=="0000c4fa0516"
get properties of udev device udevadm info --name=/dev/bus/usb/$BUS_NUMBER/$DEV_NUMBER --query=property
show info on partitions cat /proc/partitions
get info on mount process cat /proc/11/mountinfo

install

sudo apt install gvfs gvfs-fuse gvfs-bin gvfs-backends ifuse

check dev and bus

lsusb

mount

gio mount -d /dev/bus/usb/001/004

access

ls /run/user/1000/gvfs/