Hello I've just got the M4 ipad pro 13 inch,256G and I've updated the ipad with ipadOS 18 for the greate new features, also my phone, I've noticed a few days after the installation my system data has been growing like crazy, it started around 120 G when I first noticed, but has grown to 185.88GB as of today, leaving my ipad with bearly any storage left, and the same case happened for my iphone 15 pro max, but when I check today iphone storage have went down, but Ipad is still having almost 200G of unknown stuff, Am I the only one getting this issue?
New IPAD PRO M4 unknown system mem usagage
The iOS 18 and iPad 18 both have this issue now, the system files actually not contained that much of storage.
To solve this, you can change your system Time&Date to one year late, I tested this method and is effective.
oh, and also cut the network off and forced reboot. Then it is supposed to solve this issue.