"Clear your cache" is common advice, but doing it in the wrong order can log you out of apps, delete unsaved drafts, or make things temporarily slower before they're faster. Here's a safe sequence, starting with the lowest-risk options.
Start with what's actually safe: temp and cache files
Cache files are copies your device keeps to load things faster next time — clearing them never deletes anything permanent, though apps may load slightly slower the first time after.
- Windows: Open Disk Cleanup (search for it in the Start menu), select your main drive, and check Temporary files, Recycle Bin, and Windows Update Cleanup. Storage Sense (Settings → System → Storage) can also automate this going forward.
- macOS: Go to Apple menu → About This Mac → Storage → Manage. The "Optimize Storage" and "Reduce Clutter" tools show exactly what's taking space before you delete anything.
- iPhone: Settings → General → iPhone Storage shows per-app usage and offers "Offload Unused Apps," which removes the app but keeps its data for reinstalling later.
- Android: Settings → Storage → Free up space, or open individual apps in Settings → Apps and tap "Clear cache" (not "Clear data," which removes saved logins and settings).
The step that trips people up: cache vs. data
On both iPhone and Android, "clear cache" and "clear data" look similar but aren't. Cache is safe to clear anytime. Data includes your saved logins, app settings, and sometimes offline content — clearing it effectively resets the app to a fresh install. Only clear data if you're prepared to log back in and reconfigure that app.
Next: find what's actually using the space
Before deleting anything more, figure out where your storage is actually going. Photos and videos are the most common culprit, followed by downloaded media and old app installs you've forgotten about. Every platform above shows a storage breakdown by category — check it before assuming cache is your problem, since cache rarely accounts for more than a few gigabytes.
Photos and videos: the biggest win
If photos are the main space hog, check whether you're storing full-resolution originals when you don't need to. iPhone's "Optimize iPhone Storage" (Settings → Photos) keeps small versions on-device and full versions in iCloud. Google Photos offers similar tiered storage under its settings. On a laptop, moving old photo libraries to an external drive (see our guide on choosing one) frees space without deleting anything.
Downloads and duplicate installers
Your Downloads folder quietly accumulates installers, PDFs, and files you opened once and forgot. On Windows and Mac, sort the Downloads folder by size and clear out anything over a few months old that you don't recognize needing again.
Browser cache and history — separately
Clearing your browser's cache is different from clearing history or saved passwords. In Chrome, Firefox, Safari, and Edge, the "Clear browsing data" dialog lets you select cache and cookies separately from history and passwords — uncheck the ones you want to keep. Note that clearing cookies will log you out of most sites.
When to just get more storage instead
If you're clearing space every few weeks and it fills right back up, that's a sign you need more storage rather than more cleanup — either a cloud plan upgrade, a larger phone storage tier next time you upgrade, or an external drive for a laptop. Constant cache-clearing to survive week to week isn't sustainable and can shorten the life of the storage itself, particularly on solid-state drives.