Before you wipe your device, taking the time to back up Android before reset is the single most important step that separates a clean fresh start from losing years of photos, messages and app data. A factory reset erases everything in your phone’s internal storage and returns the software to its out-of-the-box state. Nothing on the device survives it, so whatever you want to keep needs to live somewhere else first: your Google account, your computer, or a memory card. This guide walks through exactly how to do that safely, with accurate Settings paths for modern Android, plus the one security gotcha that locks people out of their own phones after a reset.
Why you must back up Android before reset
A reset is irreversible. Once it completes, there is no “undo” and no recovery tool that pulls back data from a freshly wiped partition. Equally important, every Android phone running version 5.1 or newer ships with Factory Reset Protection (FRP), Google’s anti-theft lock. If you reset the phone while a Google account is still signed in, the device will demand that same Google username and password the next time it boots. Forget those credentials and the phone becomes a brick. So the rule is simple: back everything up, confirm the backup, then remove the screen lock and Google account before you wipe. For the wipe itself, see our walkthrough on how to hard reset any Android mobile.
Step-by-step: back up your data
Settings labels vary slightly between Samsung One UI, Pixel and other skins, but the destinations are the same.
- Turn on Google One Backup. Open Settings > Google > Backup (on Samsung: Settings > Accounts and backup > Back up data under Google Drive). Tap Back up now. This captures app data, call history, contacts, device settings, SMS and Wi-Fi passwords to your Google account.
- Back up photos and videos. Open the Google Photos app, tap your profile picture, and confirm Backup is on and shows “Backup complete.” Do not skip this; Google One backup does not include full-resolution media unless Photos is syncing.
- Sync contacts and calendar. Go to Settings > Accounts > your Google account > Account sync and make sure Contacts and Calendar are toggled on and recently synced.
- Copy files to a computer. Connect the phone by USB, swipe down the notification shade, tap the USB notification and choose File transfer / Android Auto (MTP). Drag your DCIM, Download and Documents folders to your PC. If your computer does not detect the phone, install the correct Android USB drivers first.
- Use the manufacturer tool. Samsung users can run Smart Switch to make a full local backup on a PC or Mac, including apps and home-screen layout. Other brands have similar PC suites.
- Save WhatsApp separately. WhatsApp chats are not in Google One. In WhatsApp, go to Settings > Chats > Chat backup and back up to Google Drive.
For a fuller breakdown of cloud and local methods, our guide on how to back up and restore Android devices covers restoring after the reset too.
Practical cautions before you wipe
- Verify the backup actually finished. Open drive.google.com or the Google One app on another device and confirm your phone’s backup timestamp is current. A half-finished backup is worse than none because it gives false confidence.
- Remove FRP yourself. Go to Settings > Accounts and remove your Google account, then disable any screen lock. This clears Factory Reset Protection so the phone does not demand credentials after the wipe. If you are selling the device, this step is essential.
- Note your microSD card. A factory reset usually leaves an external SD card untouched, but remove it before wiping if you want to be certain nothing is formatted.
- Charge above 50 percent. A reset that loses power mid-process can soft-brick the phone.
- Remember 2FA. After restoring, you will re-authenticate apps. Keep your authenticator backup codes handy.
If your phone is too unstable to reach Settings, you can still wipe it through recovery mode, and a lost or stolen device can be erased remotely using Find My Device from Google.
Frequently asked questions
Does a factory reset delete everything on my phone?
Yes. A factory reset erases all data in internal storage, including apps, photos, accounts and settings, and cannot be undone. An external microSD card is normally left intact, but anything in the phone’s own storage is gone unless you backed it up first.
Will I be locked out after the reset because of Google FRP?
You will be locked out only if a Google account was still signed in when you reset. Factory Reset Protection forces you to enter that account’s credentials on first boot. To avoid it, remove your Google account and screen lock in Settings before wiping the device.
How do I restore my data after the reset?
During the new setup, sign in with the same Google account and choose to restore from your Google One backup. Photos resync from Google Photos, and WhatsApp offers to restore from Drive when you reinstall it. Files copied to a computer can simply be dragged back over USB.
