diff --git a/rsync-cron/Readme-rync.md b/rsync-cron/Readme-rync.md
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+# Rync job for Backups
+
+a: Archive mode used to copy files recursively while preserving symbolic links, file permissions and ownership, and timestamps.
+v: Verbose mode to get more detailed information on the file transfer process.
+z: Enable file compression. This option can be omitted when transferring files locally but is incredibly useful when sending data over the network to reduce the amount of it transmitted.
+H: Preserve hard links.
+P: Show the progress of the data transfer.
+--dry-run or -n - Perform a trial run without making any changes.
+
+```bash
+# create initial full backup
+rsync -a --delete "/mnt/c/Users/dechert/git/swagup-server/rsync-cron/test-folder" "/mnt/c/Users/dechert/git/swagup-server/rsync-cron/backup-folder"
+
+
+chmod +x /usr/local/bin/backup.sh
+```
+
+Testing:
+ - deleted files
+ - restore old backup
+ - incremental
+   - 234M    ./test-backup-folder-time
+   - du -h ~/backup_test
+
+## Rsync Time backup
+https://github.com/laurent22/rsync-time-backup
+
+```bash
+bash rsync_tmbackup.sh --log-dir "/home/dechert/rsync_backup_logs" /mnt/c/Users/dechert/git/swagup-server/rsync-cron/test-folder /mnt/c/Users/dechert/git/swagup-server/rsync-cron/test-backup_folder_time
+
+# run 1 time to create backup marker
+mkdir -p -- "/mnt/c/Users/dechert/git/swagup-server/rsync-cron/test-backup_folder_time" ; touch "/mnt/c/Users/dechert/git/swagup-server/rsync-cron/test-backup_folder_time/backup.marker"
+
+# run inside linux
+bash rsync_tmbackup.sh --log-dir "/home/dechert/rsync_backup_logs" ~/backup_test/test-folder ~/backup_test/test-backup-folder-time
+
+# Restore backup
+rsync -aP ~/backup_test/test-backup-folder-time/latest ~/backup_test/test-folder --dry-run
+
+# on synology
+bash rsync_tmbackup.sh /volume2/homes/admin/marceload_backup/test-folder /volume2/homes/admin/marceload_backup/backup-folder
+
+```
+
+### Logging
+
+default log location: `LOG_DIR="$HOME/.$APPNAME"`, e.g. `/home/dechert/.rsync_tmbackup/2025-01-17-123519.log`,
+`/var/services/homes/admin/.rsync_tmbackup`
+AUTO_DELETE_LOG -> if no error: log will be deleted
diff --git a/rsync-cron/create-backup.sh b/rsync-cron/create-backup.sh
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+#!/bin/bash
+BACKUP_DIR="/mnt/c/Users/dechert/git/swagup-server/rsync-cron/test-folder"
+SOURCE_DIR="/mnt/c/Users/dechert/git/swagup-server/rsync-cron/backup-folder"
+
+# Create incremental backup with rsync
+rsync -a --delete --link-dest=$BACKUP_DIR/latest $SOURCE_DIR $BACKUP_DIR/$(date +%F_%T)
+
+# Update latest symlink
+ln -sfn $BACKUP_DIR/$(date +%F) $BACKUP_DIR/latest
diff --git a/rsync-cron/create-incremental-backup.sh b/rsync-cron/create-incremental-backup.sh
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+#!/bin/bash
+
+# https://linuxconfig.org/how-to-create-incremental-backups-using-rsync-on-linux
+# A script to perform incremental backups using rsync
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+# readonly SOURCE_DIR="${HOME}"
+# readonly BACKUP_DIR="/mnt/data/backups"
+readonly BACKUP_DIR="/mnt/c/Users/dechert/git/swagup-server/rsync-cron/backup-folder2"
+readonly SOURCE_DIR="/mnt/c/Users/dechert/git/swagup-server/rsync-cron/test-folder"
+
+readonly DATETIME="$(date '+%Y-%m-%d_%H:%M:%S')"
+readonly BACKUP_PATH="${BACKUP_DIR}/${DATETIME}"
+readonly LATEST_LINK="${BACKUP_DIR}/latest"
+
+mkdir -p "${BACKUP_DIR}"
+
+rsync -av --delete \
+  "${SOURCE_DIR}/" \
+  --link-dest "${LATEST_LINK}" \
+  --exclude=".cache" \
+  "${BACKUP_PATH}"
+
+rm -rf "${LATEST_LINK}"
+ln -s "${BACKUP_PATH}" "${LATEST_LINK}"
diff --git a/rsync-cron/create_testing_folders.sh b/rsync-cron/create_testing_folders.sh
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+++ b/rsync-cron/create_testing_folders.sh
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+mkdir backup-folder && \
+mkdir test-folder && \
+touch test-folder/file1.txt && \
+test-folder/file1.txt << "some_content"
\ No newline at end of file