WhatsApp Backup Stuck? How to Fix It (iPhone and Android)

WhatsApp Backup Stuck? How to Fix It (iPhone and Android)

You open WhatsApp, tap Back Up Now, and the backup stops at 0%, 47%, or 99%. Sometimes it stays on "Preparing backup" for hours. Sometimes it says "Couldn't complete backup" and gives up.

This is stressful, because your chats feel unsafe until the backup finishes. The good news is that your chats are still on your phone while the backup is stuck. In most cases, the problem is simple: not enough cloud space, a weak connection, or a backup that is too large.

Work through the fixes below in order, from fastest to slowest. Most people only need the first three.

Quick answer: Check your cloud storage first. On Android, WhatsApp backs up to Google Drive. On iPhone, it backs up to iCloud. Free up space, connect to strong Wi-Fi, turn off Include Videos, and try again. Keep your phone charging and leave WhatsApp open while the backup runs.

First, Check Your Last Backup

Before you try any fix, check this. It tells you if your chats are already safe, and how big the next backup will be.

Open WhatsApp, then go to Settings > Chats > Chat Backup.

This screen shows the date and time of your last successful backup, and the size of the backup. If the last backup is recent, your chats are already protected, even if today's backup is stuck. If the size is very large, for example more than 5 GB, that is probably why it keeps stopping.

Fix 1: Free Up Cloud Storage

This is the most common cause of a stuck backup. Your phone storage and your cloud storage are two different things. Freeing space on your phone will not help if your Google Drive or iCloud account is full.

On Android (Google Drive):

Google gives you 15 GB of free storage, shared across Google Drive, Gmail, and Google Photos. Open the Google Drive app and check how much space is left. If it is almost full, delete large files you do not need, empty the Drive trash, and delete old emails with large attachments. Then try the backup again.

On iPhone (iCloud):

Apple gives you 5 GB of free iCloud storage. Go to Settings, tap your name at the top, then tap iCloud to see how much space is left. If it is almost full, delete old device backups you do not need, or delete large photos and videos from Photos. WhatsApp says you need at least 2.05 times the backup size free, both on your phone and in iCloud. So a 2 GB backup needs about 4 GB of free space.

Fix 2: Use Strong Wi-Fi and Keep Your Phone Charging

A large backup needs a stable connection and time. Mobile data is often too slow, and it can stop when your phone changes networks.

1. Connect to strong, stable Wi-Fi, at home if you can. Avoid public or hotel Wi-Fi for a large backup.

2. Plug your phone in to charge, and turn off Low Power Mode on iPhone, or Battery Saver on Android, while the backup runs.

3. Leave WhatsApp open on the Chat Backup screen. Do not close the app or lock the phone for a long time. A large backup can take an hour or more.

Fix 3: Turn Off Include Videos

Videos make a backup much bigger. In many cases, turning them off cuts the backup to a fraction of its size, and the backup finishes in minutes instead of hours. Your videos stay on your phone. They are just not included in this backup.

1. Open WhatsApp, then go to Settings > Chats > Chat Backup.

2. Turn off Include Videos.

3. Tap Back Up Now and try again.

If you want your videos backed up later, you can turn this setting back on after a smaller backup has finished once.

Fix 4: Check the Right Account Is Selected

If the wrong Google or Apple account is linked, WhatsApp cannot finish the backup.

On Android:

Open WhatsApp, then go to Settings > Chats > Chat Backup. Tap Google Account and check that the right Google account is selected. This is the account that holds your backup. If you changed your Google password recently, sign in again and check that sync is working.

On iPhone:

Go to Settings, tap your name at the top, then tap iCloud. Make sure iCloud Drive is turned on, and that WhatsApp is allowed to use iCloud Drive. Also check that you are signed in to the same Apple account you used for your last backup.

Fix 5: Update WhatsApp and Restart Your Phone

An old version of WhatsApp can have backup bugs, and a restart clears small errors that stop the upload.

1. Update WhatsApp from the Google Play Store or the Apple App Store.

2. On Android, also update Google Play Services from the Play Store. WhatsApp uses it to connect to Google Drive.

3. Restart your phone, open WhatsApp again, then go to Settings > Chats > Chat Backup and tap Back Up Now.

Fix 6: Clear the Cache on Android, or Reset Network Settings on iPhone

On Android:

Old temporary files can block the backup. Go to Settings > Apps > WhatsApp > Storage, then tap Clear Cache. Never tap Clear Data. Clear Data deletes your chats and local data. After clearing the cache, open WhatsApp and try the backup again.

On iPhone:

A bad network setting can silently block iCloud. Go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings. This will forget your saved Wi-Fi passwords, so connect to Wi-Fi again after the reset. Then try the backup again.

Fix 7: Turn Off VPN, Then Try Again on Wi-Fi

A VPN, proxy, or data saver can slow the upload or block the connection to Google Drive or iCloud.

1. Turn off your VPN and any data saver mode for a few minutes.

2. If Wi-Fi is the problem, you can allow backup over mobile data for one try. Open WhatsApp, then go to Settings > Chats > Chat Backup and turn on Back up using cellular. Only do this for a small backup, because a large backup can use a lot of mobile data.

3. Tap Back Up Now and watch it for five minutes. If the percentage starts moving, leave it alone until it finishes.

What If the Backup Is Stuck at 99%?

A backup stuck at 99% usually means the cloud storage ran out right at the end. WhatsApp has already prepared the backup, but it cannot upload the last part.

Free up more space in Google Drive or iCloud first, as in Fix 1. Then turn off Include Videos, as in Fix 3, and try again. Do not keep tapping Back Up Now again and again. Each try starts the upload from the beginning.

Stay Safe: Do Not Delete Your Old Backup First

Never delete your old backup from Google Drive or iCloud just to free up space, unless you have a new backup that finished first. Deleting a backup is permanent. If you delete it and then change phones or reinstall WhatsApp before a new backup finishes, you will have no chats to restore.

Also, never tap Clear Data on Android, and never uninstall WhatsApp to fix a stuck backup, unless you already have a recent backup that finished. Your chats on the phone are safe while the backup is stuck. Uninstalling the app can remove them.

FAQs

Why is my WhatsApp backup stuck at 99%?

Most often, your Google Drive or iCloud storage is full or almost full. WhatsApp cannot upload the last part of the backup. Free up cloud space, turn off Include Videos, and try again.

How long should a WhatsApp backup take?

It depends on the size and your connection. A small backup takes a few minutes. A large backup with many photos and videos can take an hour or more on Wi-Fi. If the percentage has not moved for a long time, and your phone is charging and on Wi-Fi, it is probably stuck, not just slow.

Will I lose my chats if the backup fails?

No, not while the backup is stuck. Your chats stay on your phone. You only lose them if you delete the app, reset your phone, or delete the old backup before a new one finishes. Check Settings > Chats > Chat Backup to see the date of your last successful backup.

Can I back up WhatsApp over mobile data?

Yes, but it is better to use Wi-Fi for a large backup. In WhatsApp, go to Settings > Chats > Chat Backup and turn on Back up using cellular. A large backup can use a lot of mobile data, so turn off Include Videos first.

What should I do if Google Drive is full?

Delete large files from Google Drive, empty the Drive trash, and delete old emails with large attachments. Google Drive storage is shared with Gmail and Google Photos, so clearing those helps too. You can also turn off Include Videos to make the next backup much smaller.

Final Words

A stuck WhatsApp backup is almost always a storage or connection problem. Check your last backup, free up space in Google Drive or iCloud, use strong Wi-Fi, and turn off Include Videos. That fixes it for most people.

Set your backup to run every day or every week after this, so the next backup is small and finishes quickly. Open WhatsApp, go to Settings > Chats > Chat Backup, and set Auto Backup to Daily or Weekly. Daily backups only add what changed, so they are much smaller than one huge backup after months.

For the full step-by-step setup, see our first guide: How To Use WhatsApp Web On Laptop And Phone (Step-by-Step Guide) - https://whatsappguidesolutions.blogspot.com/2026/11/how-to-use-whatsapp-web-on-laptop-and.html

If you use WhatsApp Web and the QR code will not scan, see our other fix: WhatsApp Web QR Code Not Scanning? How to Fix It - https://whatsappguidesolutions.blogspot.com/2026/11/whatsapp-web-qr-code-not-scanning-fix.html