You checked Settings > General > iPhone Storage and gasped: CapCut is using 42GB, and TikTok is using 18GB. How did two social apps consume half of your entire smartphone's memory?
The Hidden Culprit: Uncompressed Video Proxies
When you edit a video in CapCut or create a TikTok, the app does not edit your compressed phone video directly. To keep editing playback buttery smooth, CapCut creates high-bitrate proxy files, audio waveforms, effect caches, and temporary render clips.
Even after you export the final 30-second Reel or TikTok and post it online, CapCut retains 100% of those raw project cache files on your phone indefinitely!
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Step 1: Clear CapCut's Internal Cache (Saves 10GB - 30GB)
You can purge CapCut's temporary files without losing your completed projects:
- Open the CapCut app.
- Tap the Settings (gear icon) in the top-right corner.
- Find 'Clear cache'. Notice the massive gigabyte number next to it.
- Tap Clear cache > OK. This deletes temporary preview renders without deleting your actual project timelines.
Step 2: Clear TikTok's App Cache & Watch History
- Open TikTok and go to your Profile.
- Tap the three-line menu in the top right > Settings and privacy.
- Scroll down to the Cache & Cellular section and tap 'Free up space'.
- Tap Clear next to Cache and Downloads.
Frequently Asked Questions
Will clearing CapCut cache delete my ongoing video drafts?
No. Tapping 'Clear cache' in CapCut settings only removes temporary render proxies and effect preview files. Your draft projects and original camera roll videos remain completely intact.
Why does TikTok take up 20GB on my iPhone?
TikTok pre-buffers dozens of high-definition video clips as you scroll, and downloads filters, stickers, sound clips, and watch history caches that accumulate over time.
How do I stop video editing apps from filling my camera roll?
Use Swipe Photo Cleaner to regularly review and delete duplicate take outtakes, failed video recordings, and exported raw video files once your final edit is published.