Pi Zero W als Stick, Dateien nicht sichtbar/lesbar

cd /

sudo nano /boot/config.txt
## am ende diese Zeile einfügen
dtoverlay=dwc2

sudo nano /etc/modules
## diese Zeile einfügen
dwc2

## 8GB Datei erzeugen
sudo dd if=/dev/zero of=/usbdisk.img bs=1M count=8192

## Partition anlegen / alles zusammen kopieren / einfügen
(
echo x # switch to eXpert mode
echo s # set sectors/track
echo 8 # g_mass_storage uses a sector size of 512 bytes, so 8 sectors/track will give us 4096 bytes per track
echo h # set number of heads
echo 16
echo c # set number of cylinders
echo 131072 # 8GB = 8388608 kb / 64 tracks = 32768 cylinders
echo r # return to normal mode
echo n # new partition
echo p # primary
echo 1
echo   # accept default
echo   # accept default
echo t # new partition is created by default as a Linux partition. Since you want to use the gadget with a Windows host, you should change the partition type to FAT32
echo b
echo a # partition should be set as active or USB drive will not be attached to the file-system when plugged in.
echo p # print new partition table to verify..
echo w # Write changes
) | sudo fdisk /usbdisk.img

## diese 3 Zeilen nacheinander zum formatieren / Name=pistick
## !! evtl. ist dies falsch 
sudo losetup -o $((8192*512)) /dev/loop0 /usbdisk.img
sudo mkfs -t vfat -v /dev/loop0 -n pistick
sudo losetup -d /dev/loop0

## stattdessen dies hier
sudo mkdosfs /usbdisk.img -F 32 -I


## permanent mounten und in die fstab eintragen
sudo mkdir /mnt/usb_share
sudo nano /etc/fstab
## diese Zeile am Ende eintragen
/usbdisk.img /mnt/usb_share vfat users,umask=000 0 2

## nachladen (ist auch gleichzeitig ein Test)
sudo mount -a

## Python Skript für die Ordner Überwachung
cd /usr/local/share
sudo nano usb_share.py

## den folgenden Block eintragen

## -------------------------------------------------------

#!/usr/bin/python3
import time
import os
from watchdog.observers import Observer
from watchdog.events import *

CMD_MOUNT = "modprobe g_mass_storage file=/usbdisk.img stall=0 ro=0"
CMD_UNMOUNT = "modprobe -r g_mass_storage"
CMD_SYNC = "sync"

WATCH_PATH = "/mnt/usb_share"
ACT_EVENTS = [DirDeletedEvent, DirMovedEvent, FileDeletedEvent, FileModifiedEvent, FileMovedEvent]
ACT_TIME_OUT = 30

class DirtyHandler(FileSystemEventHandler):
    def __init__(self):
        self.reset()

    def on_any_event(self, event):
        if type(event) in ACT_EVENTS:
            self._dirty = True
            self._dirty_time = time.time()

    @property
    def dirty(self):
        return self._dirty

    @property
    def dirty_time(self):
        return self._dirty_time

    def reset(self):
        self._dirty = False
        self._dirty_time = 0
        self._path = None


os.system(CMD_MOUNT)

evh = DirtyHandler()
observer = Observer()
observer.schedule(evh, path=WATCH_PATH, recursive=True)
observer.start()

try:
    while True:
        while evh.dirty:
            time_out = time.time() - evh.dirty_time

            if time_out >= ACT_TIME_OUT:
                os.system(CMD_UNMOUNT)
                time.sleep(1)
                os.system(CMD_SYNC)
                time.sleep(1)
                os.system(CMD_MOUNT)
                evh.reset()

            time.sleep(1)

        time.sleep(1)

except KeyboardInterrupt:
    observer.stop()

observer.join()

## ------------------------------------------------------------

## Datei ausführbar machen
sudo chmod +x usb_share.py

cd /

## Python Watchdog installieren
sudo apt-get install python3-watchdog

## Background Service erstellen
cd /etc/systemd/system
sudo nano usbshare.service

## folgenden Block eintragen
## --------------------------------------------------------------------
[Unit]
Description=USB Share Watchdog

[Service]
Type=Simple
ExecStart=/usr/local/share/usb_share.py
Restart=always

[Install]
WantedBy=multi-user.target
## --------------------------------------------------------------------

cd /

## Service registrieren und starten
sudo systemctl daemon-reload
sudo systemctl enable usbshare.service
sudo systemctl start usbshare.service


## TEST
sudo reboot

## Samba Freigabe einrichten

cd /

sudo apt-get update
sudo apt-get install samba samba-common smbclient

## prüfen, ob Samba läuft (besteht aus 2 Diensten)
sudo service smbd status
sudo service nmbd status

sudo nano /etc/samba/smb.conf

## workgroup sollte schon dort stehen
## dort eintragen
## -------------------
workgroup = WORKGROUP
security = user
encrypt passwords = yes
client min protocol = SMB2
client max protocol = SMB3
## --------------------

## test ob ok

testparm

## restart der Dienste
sudo service smbd restart
sudo service nmbd restart

## nun die Freigaben einrichten
sudo nano /etc/samba/smb.conf

## den Block am Ende einsetzen
## ----------------------------------------
[PiStick]
comment = PiStick-Freigabe
path = /mnt/usb_share
read only = no
public = yes
writable = yes
comment = smb share
guest ok = yes
## ----------------------------------------

## restart der Dienste
sudo service smbd restart
sudo service nmbd restart