First check what is using storage
Open your phone's storage settings and identify the largest categories. Android menus differ between manufacturers, so look for Storage or Device care rather than following a single brand-specific menu blindly.
Delete obvious junk
Remove downloads, duplicate files, old screen recordings and media you have already backed up.
Review large videos
Videos often consume more storage than photos. Check messaging apps, camera folders and downloaded videos before deleting anything.
Clear app cache carefully
Clearing cache can remove temporary files, but clearing app storage/data can sign you out or remove locally stored information. Do not confuse the two options.
Use cloud backups wisely
Confirm that photos and documents are actually backed up before deleting local copies. A backup that has not completed is not a backup you can safely rely on.
What not to delete
Avoid deleting unfamiliar system folders or files simply because they look large. If you do not know what a file is, investigate it first.