diff --git a/kopia_backup/readme.md b/kopia_backup/readme.md
index 7a71196..68f7eef 100644
--- a/kopia_backup/readme.md
+++ b/kopia_backup/readme.md
@@ -19,78 +19,126 @@ Kopia is an open source backup utility with basicly all modern features.</br>
 Cross-platform, deduplication, encryption, compression, multithreaded speed,
 cloud storage support, CLI and GUI versions, snapshots mounting,...
 
-Written in golang,
+Written in golang.
 
 In this setup kopia cli is installed directly on the host system.</br>
 A script is created that backs up the entire docker directory and /etc locally.</br>
-Cronjob is set to execute this script daily.
+Systemd service and timer are used to run the backup periodicly.
 
-The repository is also pruned on each run of the script -
-old archives are deleted while keeping the ones fitting the retention rules
-in the script.</br>
-One backup per day for last 7 days, last 4 weeks, last 6 months are kept.
+# Some aspects of Kopia
+
+* backup configuration is stored in a repository where backups will be stored<br>
+  this includes global policy, that is global in sense of repo, not all of kopia
+* you connect and disconnect from a repository before working with it,<br>
+  only one repository can be connected at time
+* currently to ignore some folders, one can create `CACHEDIR.TAG` with specific
+  [content](https://bford.info/cachedir/) and set policy: `--ignore-cache-dirs true`
+* Maintence is automatic
+* ..
 
 # Files and directory structure
 
 ```
 /home/
-├── ~/
-│   └── docker/
-│       ├── container-setup #2
-│       ├── container-setup #1
-│       ├── ...
+│ └── ~/
+│     └── docker/
+│         ├── container-setup #2
+│         ├── container-setup #1
+│         ├── ...
 │
 /mnt/
-  └── mirror/
-        └── docker_host_kopia/
-
+│ └── mirror/
+│      └── KOPIA/
+│            └── arch_docker_host/
+│
+/opt/
+  └── kopia-backup-home-etc.sh
 ```
 
-* `docker_backup/` - borg repository directory containg the backups
-* `borg_backup.sh` - the backup script that adds new archive in to the repository
-* `borg_backup.log` - log file with the dates of backups
-
-Only `borg_backup.sh` has to be provided.</br>
-Repo directory is created by `borg init` command
-and the log file is created on the first run.
-
-
 # The setup
 
-#### Install kopia
+#### install kopia
 
 for arch linux, kopia is on AUR `yay kopia-bin`
 
-#### Backing up using kopia
+#### repo creation and policy 
 
 use of sudo so that kopia has access everywhere<br>
 config files are therefore in `/root/config/kopia`
 
-- `mkdir /mnt/mirror/docker_host_kopia`</br>
-- `sudo kopia repository create filesystem --path /mnt/mirror/docker_host_kopia`<br>
-- `sudo kopia repository connect filesystem --path /mnt/mirror/docker_host_kopia`<br>
-- `sudo kopia snapshot create /home/spravca/docker`<br>
+- `sudo kopia policy get --global`
+- `sudo kopia policy list`
+- `sudo kopia policy set --global --ignore-cache-dirs true --keep-annual 1 --keep-monthly 6 --keep-weekly 4 --keep-daily 14 --keep-hourly 0 --keep-latest 14`
+
+
+
+- `mkdir -p /mnt/mirror/KOPIA/docker_host_kopia`</br>
+- `sudo kopia repository create filesystem --path /mnt/mirror/KOPIA/docker_host_kopia`<br>
+- `sudo kopia repository connect filesystem --path /mnt/mirror/KOPIA/docker_host_kopia`<br>
+- `sudo kopia repository status`
+- `sudo kopia snapshot create /home/spravca/docker /etc`<br>
 - `sudo kopia snapshot list`<br>
 - `sudo kopia mount k7e2b0a503edd7604ff61c68655cd5ad7 /mnt/tmp &`<br>
 - `sudo umount /mnt/tmp`<br>
 
+#### the backup script
 
-#### The backup script
+`/opt/kopia-backup-home-etc.sh`
+```
+#!/bin/bash
 
+#sudo kopia policy set --global --keep-annual 1 --keep-monthly 6 --keep-weekly 4 --keep-daily 14 --keep-hourly 0 --keep-latest 14
 
+REPOSITORY_PATH='/mnt/mirror/KOPIA/docker_host_kopia'
+BACKUP_THIS='/home /etc'
+export KOPIA_PASSWORD='aaa'
 
+kopia repository connect filesystem --path $REPOSITORY_PATH
+kopia snapshot create $BACKUP_THIS
+kopia repository disconnect
+```
 
-### Manual run
-
-
-### Automatic execution
+### Automatic execution using systemd
 
 
 # Accessing the backup files
 
 
-# Extra info
 
+# Mounting using systemd
+
+* the name of mount and automount files MUST correspond with the path<br>
+  instead of `/` a `-` is used, but otherwise it must be the mounting path in name
+* for mounting that does not fail on boot, and mounts the target only on request
+  enable automount file, not mount file, so:<br>
+  `sudo systemctl enable mnt-mirror.automount`
+
+`mnt-mirror.mount`
+```ini
+[Unit]
+Description=3TB truenas mirror mount
+
+[Mount]
+What=//10.0.19.11/Mirror
+Where=/mnt/mirror
+Type=cifs
+Options=rw,username=kopia,password=aaa,file_mode=0644,dir_mode=0755,uid=1000,gid=1000
+
+[Install]
+WantedBy=multi-user.target
+```
+
+`mnt-mirror.automount`
+```ini
+[Unit]
+Description=3TB truenas mirror mount
+
+[Automount]
+Where=/mnt/mirror
+
+[Install]
+WantedBy=multi-user.target
+```
 
 # Remote backup
 
diff --git a/kopia_backup/script b/kopia_backup/script
new file mode 100644
index 0000000..844859d
--- /dev/null
+++ b/kopia_backup/script
@@ -0,0 +1,11 @@
+#!/bin/bash
+
+#sudo kopia policy set --global --ignore-cache-dirs true --keep-annual 1 --keep-monthly 6 --keep-weekly 4 --keep-daily 14 --keep-hourly 0 --keep-latest 14
+
+REPOSITORY_PATH='/mnt/mirror/KOPIA/docker_host_kopia'
+BACKUP_THIS='/home /etc'
+export KOPIA_PASSWORD='aaa'
+
+kopia repository connect filesystem --path $REPOSITORY_PATH
+kopia snapshot create $BACKUP_THIS
+kopia repository disconnect