
"Also: I changed 10+ settings on my iPhone to significantly extend its battery life (iOS 26 and older) And while Apple would love for you to solve the problem by upgrading your iCloud+ plan, that's not your only option. There are plenty of built-in iOS 26 tools that can help reclaim storage, and most of them are completely free to use."
"System Data can quietly balloon to gigabytes without you realizing it, but it's mostly made up of caches and temporary files that iOS manages on its own. How to check system data on your iPhone Open Settings. Tap General. Tap iPhone Storage. Look for System Data at the bottom of the list. If you see a high gigabyte number, try closing all your apps and restarting your phone."
"System Data fluctuates constantly. I've seen it jump to 30GB and then drop by 10GB overnight without me touching a thing. Unfortunately, you can't manually clear it, but closing unused apps and restarting your phone can sometimes help shrink that number. For example, when I checked just now, it was 17GB. I closed my apps, restarted my phone, and now it's at 12GB. Hey, that's 5GB saved!"
iPhone storage often becomes full due to photos, videos, downloaded apps, browser cache, and growing system data. iCloud+ is optional because built-in iOS 26 tools can reclaim space for free. System Data is mainly caches and temporary files that can balloon to many gigabytes and often fluctuates. Users can check System Data via Settings > General > iPhone Storage and may reduce it by closing apps and restarting the phone. Offloading or deleting unused apps is a key storage-saving feature. Simple routine steps can free multiple gigabytes without deleting treasured content.
Read at ZDNET
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