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[ikrasnopeev]

@dswv42

@ikrasnopeev

It was caused by internal_backup recreating crontab on its start. After uninstalling it - now entries are added to crontab as expected.

Interesting find. I did a quick check and found that the internal_backup binary program uses the libctc.so shared library to create crontab entries in the /etc/NAS_CFG/config.xml file, which is then copied to /usr/local/config/config.xml so it will survive reboots.

Therefore, it seems that my original My Cloud OS3 method of editing the config.xml file to add cron jobs still works with My Cloud OS5, possibly with minor variations. I haven’t tested it, so I don’t know for sure.

How to Make Persistent System Changes (crontab, etc)

Looks like you are right. After uninstalling internal_backup editing config.xml starts to be persistent.