custom Path not working - save to the path

Hi to all, i have one small problem and i want your help, My problem is that my setup cant save the media files are created (movies or pictures) to my external ssd usb HDD

My setup : Raspberry pi 4 2GigaRam Raspberry pi Os lite - Kernel version: 5.10 Docker : 20.10.8 Portainer : 1.24.2 MotionEye Version : 0.42.1 Motion Version : 4.2.2 OS Version : Debian 9.12 log2ram : installed (to extend Sd card life , swap disabled ) External usb SSD HDD : Intenso 256 Giga Fat32

i installed the usbmount to auto mount my external usb drive/Hdd My mounting point is : /mnt/usb1

My setup to the camera is : File Storage, Custom Path : /mnt/usb1/motioneye/Camera1 (default path was : /var/lib/motioneye/Camera1)

in : /etc/motioneye/motioneye.conf i changed also the path (it was the last thing i did when i saw that everything else didnt work)

# default output path for media files (must be writable by motionEye)
#media_path /var/lib/motioneye
media_path /mnt/usb1/motioneye

with : lsblk -fp the result is :

NAME FSTYPE LABEL UUID                                 FSAVAIL FSUSE% MOUNTPOINT
/dev/sda
|                                                                     
`-/dev/sda2
     vfat   SSD   0B44-D05F                             238.4G     0% /mnt/usb1
/dev/mmcblk0
|            

with : sudo blkid the result is : /dev/sda2: LABEL_FATBOOT="SSD" LABEL="SSD" UUID="0B44-D05F" TYPE="vfat" PTTYPE="atari" PARTUUID="17d64133-02"

From terminal i can see my mounting point and can explore / create folders with all my users (root,pi,myuser) cd /mnt/usb1

But i cant find a folder named "motioneye" . is like the motioneye cant write to the SSD or cant see it ?