Guides
Free up iPhone and Android storage without losing photos
Storage full? Find large files, sort your photos and understand the difference between clearing cache, backing up and deleting on iPhone and Android.
To free up phone storage, first identify what occupies it. Remove unnecessary downloads and unused apps, then sort your photos after checking their backup. Choose the action that addresses your largest storage category instead of deleting files at random.
What should you check before deleting files?
Open a few photos and documents in your backup copy. Confirm that they are the right files and that you can access them. Synchronization is not necessarily an independent backup: deleting an iCloud Photos item also removes it from other synced devices. Apple explains this behavior.
Write down your available space before starting. Work on a small batch first so you can see what changes and catch an unexpected deletion before continuing.
On iPhone: storage, offloading and photos
- Open Settings → General → iPhone Storage and identify the largest categories and apps.
- Review the recommendations. Offloading an unused app removes the application while keeping its documents and data; deleting it also removes associated data.
- Remove downloaded films, podcasts or other replaceable media from the app that stores them.
These options appear in Apple’s iPhone storage guide. If you use iCloud Photos, storage optimization keeps device-sized versions while retaining originals in iCloud, subject to available account storage. See Apple’s photo storage guide.
On Android: cache is different from app data
Open Settings → Storage and inspect the categories. Labels vary by manufacturer and Android version. Cache contains temporary items; clearing an app’s storage removes its data and may require signing in or setting it up again. Google describes the distinction.
If you back up to Google Photos, check that the backup is complete before using its space-saving feature. It removes eligible local copies. Viewing them afterwards may require internet access: read the feature’s conditions.
How do you sort a gallery without deleting everything?
Work by album or date range. Compare similar shots, keep the version you prefer and review the selection before confirming. Checking a long video can be more useful than starting with a handful of small screenshots.
MonTri, our photo-sorting app, offers swipe-based sorting and a selection to review before deletion. It helps you decide what to keep; it does not replace a backup. Its features and paid options are described in the App Store listing.
Frequently asked questions
Why did I recover less space than expected?
Check the relevant app’s trash, remaining downloads and the storage category you are measuring. Return to the storage screen afterwards. Empty a trash folder only after checking its contents, as this can make recovery impossible.
Should I convert every photo to JPEG?
No. Conversion does not guarantee a smaller file and can change quality or metadata. Start by removing unwanted files and using the storage options documented for your device.
Sources and documentation
References used for this revision are available below.

