Your WhatsApp backup sits at 99% for hours, or spins on "Preparing Google Drive" forever. When WhatsApp backup is stuck on Android, your chats aren't protected — and the next phone switch or reinstall could cost you everything. The usual culprits: weak Wi-Fi, a full Google Drive, or a backup too large to finish. Here are 6 fixes for WhatsApp backup stuck.
Quick Answer: WhatsApp backup stuck? Connect to strong, stable Wi-Fi and keep the phone charging with WhatsApp open — large backups need time and power. Then check your Google Drive storage has enough free space, and turn off Include videos in WhatsApp → Settings → Chats → Chat backup to shrink the backup dramatically.
In This Guide:
Figure Out What's Wrong
First, check what WhatsApp itself says: open WhatsApp → Settings → Chats → Chat backup. The screen shows the last successful backup's date and size — if the date is recent, your chats are already protected even if today's run is stuck.
- Stuck at 99% or "Preparing" → the chats are often already copied; media upload or the Drive handshake is stalling (Fixes 1–3).
- Fails immediately with an error → account or storage problem (Fixes 2, 4).
- Backup never starts automatically → battery optimization killing WhatsApp overnight (Fix 5).
The backup size shown on that screen tells you how much free space you need — aim for at least double that amount free on both the phone and Google Drive.
Fix 1: Use Strong Wi-Fi and Keep Charging
Backups are big uploads. Weak Wi-Fi and a dying battery are the top reasons they stall:
- Connect to strong, stable home Wi-Fi — not hotel, airport, or office guest Wi-Fi, which often throttle or interrupt large uploads.
- Plug in the charger and leave WhatsApp open in the foreground.
- Start the backup manually: WhatsApp → Settings → Chats → Chat backup → Back Up Now.
- Watch it for five minutes: if the percentage moves at all, even slowly, leave it alone — a first backup can take an hour or more. If it doesn't move at all, continue to the next fixes.
Overnight backups work best: start them when you plug in for the night on Wi-Fi, and let Android's scheduled backup do its job undisturbed.
Fix 2: Free Up Google Drive Space
WhatsApp backups count toward your Google Account storage limit. A full Drive silently stalls the backup:
- Open the Google Drive app (or drive.google.com) and check your storage quota.
- Delete what you don't need: old files, large videos, and — importantly — empty the trash, since trashed files still count against your quota.
- Check Google Drive → Settings → Manage apps → WhatsApp Messenger — if a previous incomplete backup is sitting there, delete its data to let a fresh backup through. (Your phone's chats are untouched.)
- Aim to have at least 2 GB more free than your estimated backup size.
Also free up phone storage: if the phone is nearly full, WhatsApp can't assemble the backup file — check Settings → Storage and clear space.
Fix 3: Turn Off "Include Videos"
Videos make WhatsApp backups several times larger — and they're the most common reason a backup never finishes:
- Go to WhatsApp → Settings → Chats → Chat backup.
- Turn off the Include videos toggle.
- Tap Back Up Now and watch it complete much faster.
- Once a text-and-photo backup succeeds, you can re-enable videos later — or keep them off permanently and let Google Photos handle video backup instead.
To shrink the backup further, prune giant chats: WhatsApp → Settings → Storage and data → Manage storage shows which chats hog the most space. Removing your biggest forwarded-video group chats can cut the backup size in half.
Fix 4: Check the Google Account Connection
If WhatsApp isn't linked to the right Google account — or lost permission to write to Drive — the backup can't complete:
- Open WhatsApp → Settings → Chats → Chat backup and confirm the Google account shown is the one with available Drive storage.
- If it's wrong, tap it and select the correct account.
- On the phone, go to Settings → Passwords & accounts → Google and confirm the account is syncing properly.
- If problems persist, remove and re-add the Google account: Settings → Passwords & accounts → Google → (account) → Remove account, restart the phone, then add it back. This refreshes the authentication WhatsApp uses for Drive.
Also update Google Play Services from the Play Store — it's the background service that bridges WhatsApp and Google Drive, and outdated versions cause silent authentication failures.
Fix 5: Force Stop and Clear WhatsApp Cache
A stuck backup process can linger in the background and block every retry:
- Go to Settings → Apps → WhatsApp → Storage & cache and tap Clear cache. (Never tap Clear data — that deletes your chats.)
- Tap Force stop.
- Reopen WhatsApp and tap Back Up Now again.
- Set WhatsApp's battery to Unrestricted (Settings → Apps → WhatsApp → Battery) so Android doesn't kill overnight backups — this is the top cause of automatic backups that never run.
Also check that WhatsApp has storage permission: Settings → Apps → WhatsApp → Permissions — it needs storage/media access to assemble the backup.
Fix 6: Update WhatsApp and Restart
Backup bugs get patched in WhatsApp updates:
- Open the Play Store, search WhatsApp, and tap Update if available.
- Restart the phone completely.
- After reboot, connect to Wi-Fi, plug in, and run the backup manually.
Covers Android 10 through 14. If the backup worked before and broke after an update, a follow-up patch usually arrives within days — keep auto-updates on.
What If Nothing Works?
- Back up over cellular: in Chat backup settings, enable Back up using cellular temporarily if your Wi-Fi is the problem (watch your data usage).
- Local backup fallback: set Back up to Google Drive → Never and tap Back Up — this creates a local backup on the phone's storage, which still protects you against app reinstalls.
- As a last resort: turn off auto-backup, wait ten minutes, then turn it back on — this clears corrupted partial files and forces a fresh start.
- Reinstall WhatsApp only after confirming a successful backup exists — otherwise you risk your chat history.
In most cases, Fix 1 (strong Wi-Fi + charging) or Fix 2 (Drive space) un-sticks the backup.
Watch: WhatsApp Backup Stuck Fixed Step by Step
Prefer a walkthrough? This video covers WhatsApp backup getting stuck on Android step by step:
Video by One Click Nexus — full credit to the creator.
Related Guides:
Frequently Asked Questions
Why is my WhatsApp backup stuck at 99%?
At 99%, the chats are usually already copied — WhatsApp is finishing media uploads or the Drive handshake. Leave it on strong Wi-Fi while charging for a while longer. If it never moves, turn off "Include videos" (Fix 3) and retry — large video libraries are the most common cause.
Will clearing WhatsApp's cache delete my chats?
No. Clearing cache only removes temporary files and is completely safe. Never tap Clear data though — that erases your chat history. Use Clear cache only.
Do WhatsApp backups use my Google Drive storage?
Yes — WhatsApp backups count toward your Google Account storage limit. If your Drive is full, the backup stalls. Free up space (and empty the trash) so there's at least a couple of gigabytes more free than your backup size.
By Sameer Zehri | App Fix Guru Editor | Last updated: October 2026
