* https://unix.stackexchange.com/questions/67539/how-to-rsync-only-new-files
  * https://stackoverflow.com/questions/15787676/rsync-how-to-do-a-checksum-on-rsync

<code>rsync --verbose --recursive --update --ignore-existing --progress '/var/ftp/nas1/' '/var/ftp/nas2/'</code>

===== Main NAS Backup to Back-up =====

  * ''--exclude Videos'' for separate drive

<code>rsync --recursive --update --ignore-existing --verbose --debug='ALL' --exclude 'Videos' '/run/media/espionage724/NAS/' '/run/media/espionage724/20250824-NAS'</code>

<code>--checksum --checksum-choice='md4'</code>

===== 4TB Restore =====

  * 4TB HDD restore to 10TB NAS drive
  * Exclude ''Videos'', ''Games'', ''Music''

<code>rsync --recursive --update --ignore-existing --verbose --debug='ALL' --exclude 'Videos' --exclude 'Games' --exclude 'Music' '/run/media/espionage724/20250824-NAS/' '/run/media/espionage724/NAS'</code>

  * Games

<code>rsync --recursive --update --ignore-existing --verbose --debug='ALL' '/run/media/espionage724/20250824-NAS/Games/' '/run/media/espionage724/NAS/Games'</code>

  * Music (:!: ''&&'' with ''Videos'' overnight)

<code>rsync --recursive --update --ignore-existing --verbose --debug='ALL' '/run/media/espionage724/20250824-NAS/Music/' '/run/media/espionage724/NAS/Music'</code>

  * Videos (some)

<code>rsync --recursive --update --ignore-existing --verbose --debug='ALL' '/run/media/espionage724/20250824-NAS/Videos/' '/run/media/espionage724/NAS/Videos'</code>

===== 2TB USB Restore =====

  * Videos 2 (WD ext)

<code>rsync --recursive --update --ignore-existing --verbose --debug='ALL' '/run/media/espionage724/688EDD408EDD0808/Dragon Ball DBOX' '/run/media/espionage724/NAS/Videos/Anime'</code>

<code>rsync --recursive --update --ignore-existing --verbose --debug='ALL' '/run/media/espionage724/688EDD408EDD0808/Dragon Ball GT' '/run/media/espionage724/NAS/Videos/Anime'</code>