is this normal status or error? DJI Phantom 4 Pro Battery Status - self discharge during storage

Thats normal.
The batteries have a self discharge feature that can be user adjusted in the app.
The discharge feature is designed to keep the battery in optimal condition during long periods of storage
Many pilots set this limit to 3 days but others set it for a longer period upto 10 days before discharge commences, it all depends on your persnol circumstances.

Yes, as stated above you can go into your battery settings and set the number of days before self discharge starts. The default is 10 days and it will discharge to around 40-50% which is an optimal storage charge. I use the 3 battery hub and if I have been flying and the batteries are down to my normal end percentage which is 20% and I am not going to fly for a while I will put them in the hub and into the storage mode to bring them to 50% and then remove them from the hub and re-insert them in the charge mode to bring them all the way up the day before flying. When the battery is new give it a full charge and only fly it to 50% the first few times and after that try not to go below 20% in your flight and you will get excellent use out of your batteries. The battery hub is a good investment.

Check the  Intelligent Flight Battery Safety Guidelines.
It's all in there:
https://www.dji.com/phantom-4-pro/info?site=brandsite&from=landing_page#downloads

As all the other replies say this a normal status message, but one can only wonder why it is there as it can't be any different as long it is not possible to turn off the self-discharge feature, lets call it customer confusing information overload.

Hey there, it is a feature of battery, you can find more details from here: https://dl.djicdn.com/downloads/phantom_4_pro/20170125/flight+battery+safety+guidelines/Phantom+4+Series+Intelligent+Flight+Battery+Safety+Guidelines+En.pdf