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  • 5 Best Ways to Permanently Delete Android Data | MakeUseOf
October 4, 2023

5 Best Ways to Permanently Delete Android Data | MakeUseOf

5 Best Ways to Permanently Delete Android Data | MakeUseOf

by Malika Karoum / Sunday, 08 November 2020 / Published in Malika Karoum Global News

When you delete a file from your Android phone, it actually remains in your device’s storage until it’s overwritten with new data. This used to be a major privacy concern, because it meant that deleted files could be retrieved using data-recovery software.

Since Android 6 all Android phones are encrypted by default, which should prevent recovery tools from accessing their contents. But if you’re still concerned about sensitive files falling into the wrong hands, we’ll explain how to permanently erase your data.

1. Delete Items Using a File Manager

The worst way to delete a private file from your Android phone is from within the associated app. This risks the item being moved to a Trash or Bin folder rather than being permanently removed, or continuing to exist as a synced cloud copy.

The Google Photos app, for example, stores deleted images and videos for 60 days, unless you manually empty its trash. Even if you bypass this by choosing Delete from device, items will remain in your Google account.

A much better option is to use a file explorer or file manager app to permanently delete sensitive items. There are lots of free file explorers for Android, including Google’s own excellent Files app.

Select the item in your file explorer, then either tap the trash button or press the three-dot menu and choose Delete. Confirm you understand deletion can’t be undone and tap Delete again.

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2. Erase Data With a File Shredder

If your phone’s encryption doesn’t reassure you that deleted files can’t be recovered, or if you’re running an old version of Android, consider installing a file shredder. This will securely erase “free” space on your device that may still contain deleted data.

File shredders such as iShredder, Shreddit, and Data Eraser offer a choice of shredding algorithms. This lets you decide how many times the data is overwritten with random characters. Each overwrite is known as a “pass” or “cycle”, and the more passes, the slimmer the chance deleted data can be retrieved.

You’ll need to grant these apps permission to access your files (and optionally your contacts, which we wouldn’t recommend), but they won’t shred anything without asking you for confirmation.

Wipe Free Space Using Data Eraser

Here’s how to make deleted data unrecoverable using the ad-free file shredder Data Eraser. Confusingly, this is called Android Eraser in the app itself.

  1. Tap Freespace on the home screen (be careful not to choose Complete Erase!) and select Internal Storage. The app will calculate how much free space to wipe.
  2. Tap Continue and choose a shredding algorithm. NATO Standard and BSU TL-0342, which perform seven and eight passes respectively, are the most thorough. However, they also take a long time.
  3. Confirm you want to proceed, and Data Eraser will wipe all available free space on your phone, so that files you’ve deleted can’t be recovered.
  4. Your phone will be slow while the wiping process is in progress. You can abandon it at any time by opening the notification at the top of your screen and tapping Cancel.
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Although Data Eraser doesn’t charge to wipe the free space on your phone, you can only shred 100MB of individual files for free per day. Upgrading to the paid version for $ 4.99 removes this limit.

Shreddit is a completely free alternative, but its ads can be obstructive and it doesn’t work in Android 11.

3. Delete Android Files From Your PC

If you don’t want to install an app to permanently delete a file, you can connect your Android phone to your PC and wipe the data via Windows. This method makes it easier to quickly find and confidently remove specific items, using File Explorer.

Connect your phone using a USB cable and choose Open device to view files from the AutoPlay options. Alternatively, open File Explorer, select This PC, and double-click your phone’s drive icon.

If the drive looks empty, pull down the notification tray from the top of your phone’s screen, tap USB charging this device and select File transfer or Transfer files. Or go to Settings > Connected devices > USB and enable the option there.

Browse the folders on your phone to locate the file you want to delete. If it’s a photo or video, it’s likely to be in the DCIM > Camera folder.

Right-click the item, choose Delete and confirm you want to delete it permanently. Note that the file won’t be sent to the Windows Recycle Bin, but will be gone for good.

Related: Can I Control My Android Phone From My Computer?

4. Erase Sensitive Files From SD Cards

If the private file you want rid of is located on an SD memory card, rather than in your phone’s internal storage, there are a couple of ways to delete it.

First, go to Settings > Storage > SD card. Locate the file and delete it from there. However, this won’t make it unrecoverable, so you may want to format the card, too. This will completely wipe its contents, so make sure you move any files you want to keep to your phone first.

Tap the three-dot menu in the top-right corner and choose Storage settings. Select Format, then tap Erase & Format or Format SD card to wipe and format the card.

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Alternatively, you can connect your phone to your PC, as described above, or insert the SD card in your computer’s card reader. You’ll need to “unmount” the card first by choosing Unmount or Eject before you remove it from your device.

Browse the SD card’s contents in File Explorer, locate the file, right-click it, and choose Delete.

Additionally, some Android file shredder apps can delete and overwrite data stored on SD cards, including Data Eraser (see tip 2, above).

5. Restore Your Phone to Factory Settings

The most drastic way to permanently delete private files is to perform a factory reset. This will erase all the data on your phone, so is best used prior to selling or recycling your device. You should back up any Android data you want to keep beforehand.

To ensure that data can’t be recovered after a factory reset, double-check that your phone is encrypted. Go to Settings > Security > Advanced and tap Encryption & credentials. Select Encrypt phone if the option isn’t already enabled.

Next, go to Settings > System > Advanced and tap Reset options. Select Erase all data (factory reset) and press Delete all data.

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Enter your security code or pattern when prompted, then tap Delete all data to restore your phone to factory settings. You can wipe its free space with a file shredder if you’re still paranoid about your data being recovered.

Related: Can Android Data Be Recovered After a Factory Reset?

Permanently Delete Your Data

Nobody wants their private files to fall into the hands of snoopers and hackers. Although Android’s built-in encryption should make your deleted data unrecoverable, trying the other methods we’ve outlined will give you total peace of mind.

Of course, this all works both ways. Sometimes you’ll delete files by mistake. If you act quickly enough, and get the right tools, you will be still able to recover those deleted photos and other data.

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Tagged under: Android, Best, Data, Delete, MakeUseOf, Permanently, Ways

About Malika Karoum

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