Files by Google is the default cleaner on stock Android and it almost always works. When it does not, the failure is usually one of eight symptoms: the Clean tab is stuck on “Analyzing”, the junk-files card never appears, the delete button is grayed out, the app says everything is clean when the storage bar disagrees, backed-up-media suggestions never show up, duplicate detection is missing, cache clearing does nothing, or delete confirmations loop back to the same screen. Below is the fix for each, in the order you should try them.
For the wider walkthrough of the Clean flow, see our Files by Google review and clean guide. This article is troubleshooting only.
1. Clean tab is stuck on “Analyzing…”
The scanner runs off the MediaStore index. If MediaStore is rebuilding, or a very large folder (10,000+ items in one directory) is being enumerated, the analyzer can hang for minutes.
Fix, in order:
- Wait five minutes. The first scan after a phone restart or an OS update legitimately takes a while.
- Kill Files by Google in Recents, then reopen it. Tap Clean again.
- Settings, Apps, Files by Google, Storage, tap Clear cache (not Clear storage). Reopen the app.
- Reboot the phone. This forces the MediaStore service to restart with a clean index.
If Analyzing still hangs after a reboot, one specific folder is almost always the cause. Open the Browse tab, sort by “Largest folder”, and look for one with 10,000 or more files. Typical culprits: /Android/media/com.whatsapp/WhatsApp/Media/WhatsApp Images, /DCIM/.thumbnails, and the download folder of any web scraper. Move that folder to a subfolder, or archive it to Google Drive, then rerun Clean.
2. Junk files card never appears
“Junk files” is one of the six cards Review and clean surfaces. It only appears when the on-device cache directories that Files by Google can enumerate contain more than about 100 MB of expendable data. On a phone that already runs low-cache, it may legitimately have nothing to flag.
Confirm it’s actually broken:
- Open Settings, Apps, sort by size, pick the three biggest apps. Note their cache size.
- Add the numbers. If the total is under 100 MB, Files by Google is behaving correctly and there simply is not enough app-visible cache to flag.
- If the total exceeds a gigabyte and Files by Google shows nothing, that is the bug.
Fix:
- Files by Google, tap the profile icon, Settings, confirm Notify me about junk files is on. If it was off, the internal scanner may not have run recently. Turn it on and pull-to-refresh the Clean tab.
- Grant All files access (Android 11+): Settings, Apps, Files by Google, Permissions, Files and media, All files. On Android 10 and below, grant Storage.
- Force stop the app, clear its cache, reopen. Give the scanner two minutes to warm up.
3. Delete button is grayed out
Two conditions gray out the button: the selection is empty (no cards ticked) or an underlying file lives on a location Files by Google cannot write to.
Fix:
- Confirm at least one card is selected. The button only activates when the selected size counter is above zero.
- If a card is selected and the button is still gray, one of the files is on a removable SD card or a USB OTG drive that lost write permission. Tap the card, use the three-dot menu, Select all except, then untick anything on removable storage. Files by Google needs the Scoped Storage grant to write to
/sdcard/Android/data. Grant it via Settings, Apps, Files by Google, Permissions. - If the button stays gray with only internal storage selected, uninstall Files by Google’s storage cache: Settings, Apps, Files by Google, Storage, Clear cache. Reopen the app. Do not tap Clear storage. That deletes your Trash queue.
4. Says “You’re up to date” but storage is nearly full
Storage full but no junk to clean almost always means the space is inside media you keep on purpose (Photos, videos, WhatsApp Images), or inside app data that Files by Google cannot enumerate from the file system.
Fix:
- Open the Browse tab, tap Internal storage, sort by size descending. The top ten items usually reveal 60 to 80 percent of the missing space.
- Long-press any oversized folder to see who owns it. WhatsApp Media, Telegram Documents, Snapseed exports, and the Downloads folder are the four most common winners.
- For app-private data (e.g. Instagram cache stored inside the app’s private directory), Files by Google cannot enumerate it. Go to Settings, Apps, [app name], Storage, and use the OS-level Clear cache there. For a batch version of the same operation, see our Clean Master alternatives ranking; 1Tap Cleaner and SD Maid 2 both handle app-private caches Files by Google cannot see.
5. Backed-up-media suggestion never appears
The “Delete backed-up photos and videos” card only shows up when Google Photos has confirmed the local copies are safe in the cloud. Any of the following blocks it: you are not signed into Photos with the account Files by Google uses, backup is paused, backup is set to Wi-Fi only and you are on cellular, or Photos is still uploading.
Fix:
- Open Google Photos, tap the account avatar. Confirm the top card says Backup complete or Backup on, not Backup paused or Backup off.
- If a folder is missing from backup, tap Library, Utilities, then check Backup device folders. Add WhatsApp Images or camera-app-specific folders you want backed up.
- Wait until Photos finishes uploading. On a fresh phone with 20 GB of unuploaded photos, that can take an evening on home Wi-Fi.
- Return to Files by Google, pull-to-refresh Clean. The card should appear within a minute of Photos reporting all-clear.
6. Duplicate detection is missing files
Files by Google matches duplicates by hash: identical bytes, identical file. It does not match near-duplicates: the same photo saved as PNG and JPG, two exports of the same edit at different quality settings, or two nearly-identical burst shots.
If that is the problem, no fix inside Files by Google will help. You need a photo-dedup tool that hashes visual content, not bytes. Our Files by Google review and clean guide recommends SD Maid 2 for orphan files and AVG Cleaner for content-similar photos. Install one of those alongside Files by Google, do not replace it.
If the duplicate card should be present and just is not: Confirm All files access is granted (see fix 2). Confirm the two duplicate files are not both inside /Android/data, which Scoped Storage restricts. If they are, the app cannot compare them.
7. Cache clearing appears to do nothing
Files by Google reports “Freed N MB” and the storage bar barely moves. This is normal on modern Android, and here’s why: Google Photos, Chrome, Instagram and the like refill their caches within minutes of clearing them. The cache exists precisely to save bandwidth on the next open.
Fix: Do not chase RAM boosters or aggressive schedulers. Clear cache once when you actually need the space (before installing a large game, before an OS update, before a factory reset). Between those, let the caches be. Clearing them every day makes apps slower, not faster.
8. Delete confirmation loops back
Rare, but happens after a botched update. Tapping Delete on a card opens the confirmation sheet, you confirm, and the sheet closes without deleting anything. Reopening Clean shows the same items.
Fix:
- Settings, Apps, Files by Google, Storage, Clear cache.
- If that fails, Clear storage. This nukes the Trash queue, so first check Trash and restore anything you meant to keep. After clearing storage, Files by Google reopens as a fresh install, and the Trash queue starts over.
- If it still loops, uninstall and reinstall from Google Play or Aptoide. Reinstalling reregisters the app with MediaStore and clears any corrupt state left over from a partial update.
Still broken after all eight
If none of the above works, the phone likely has an OEM cleaner overriding Files by Google. Samsung’s Device Care, Xiaomi’s Cleaner, and OnePlus’s Storage manager all schedule their own scans and can starve Files by Google of scan cycles.
Two options:
- Disable the OEM cleaner. On Samsung, Settings, Battery and device care, three-dot menu, Automation, turn off Auto optimise every day. On Xiaomi, Cleaner app, three-dot menu, Settings, disable scheduled cleanup. On OnePlus, Settings, Storage, three-dot menu, disable Storage cleaner automation.
- Or accept that on that specific phone, the OEM cleaner is doing the job and use it instead. Our Samsung Galaxy junk cleanup guide walks through Device Care specifically.
FAQ
Why is Files by Google review and clean not working on my phone?
The most common cause is a missing All files access permission (Android 11+) followed by a MediaStore index still rebuilding after an update or reboot. Grant the permission, then wait five minutes, then reopen the app. If it still fails, clear the app’s cache from Settings, Apps, Files by Google, Storage.
Why does Files by Google say “You are up to date” when my storage is full?
Because the space is inside media you keep on purpose (photos, videos, WhatsApp Media) or app-private caches Files by Google cannot see from the file system. Open the Browse tab, sort Internal storage by size, and the top ten items usually account for most of the missing GBs.
How do I force Files by Google to rescan?
Files by Google, Clean tab, pull down to refresh. If that does not trigger a rescan, force stop the app (Settings, Apps, Files by Google, Force stop), reopen, then pull to refresh. A phone restart is the nuclear option and always works.
Why can I not delete backed-up photos from Files by Google?
Because Google Photos has not yet confirmed the local copies are safe in the cloud. Open Photos, confirm Backup on and Backup complete, wait for any pending uploads to finish, then return to Files by Google and pull-to-refresh. The Delete backed-up media card appears only after Photos reports all-clear.
Is it safe to clear Files by Google’s own storage?
Clearing cache is safe. Clearing storage nukes the Trash queue (any files you deleted in the last 30 days that are still recoverable). If you have important recoverable items in Trash, restore them first, then clear storage.
