How to safely store important documents on your smartphone

Keeping scans of your passport, driver’s license, bank cards, insurance policies, or other sensitive documents directly in your phone’s gallery is one of the most common — and risky — mistakes. If the phone is stolen, hacked, or even sent for repair, these files may become easily accessible.

According to IT expert Vladimir Zykov, editor-in-chief of the tech publication Runet, a few simple practices can significantly reduce the risk of data leaks.

Core digital safety rules

1. Never keep documents in the gallery or regular folders

Your phone’s Gallery or Files folders are among the most vulnerable locations. Even when the device is locked, some apps — including malicious ones — can potentially access media files.

Recommendation:
Delete all document scans from visible folders.

2. Use secure storage inside the smartphone

Most modern phones offer built-in protected storage areas.

Examples:

Android

• Samsung — Secure Folder
• Xiaomi / HyperOS — Private Safe
• Huawei / Honor — Private Space

iPhone

• Hidden and Recently Deleted albums in Photos
• Locked Folder (iOS 16+)
• Third-party encrypted file managers

These areas are protected by PIN codes, passwords, or biometrics and remain invisible to standard file managers.

3. Encrypt files before storing them

The safest method is to place documents inside a password-protected archive (ZIP or RAR).

Use a strong password:

• at least 12–16 characters
• mix of letters, numbers, and symbols

Popular apps include:

• RAR
• 7-Zip
• Documents by Readdle
• WinZip
• Bandizip

After creating the encrypted archive, delete the original files.

4. Store backups in encrypted cloud services

A second layer of protection is storing documents in encrypted cloud storage with two-factor authentication (2FA).

Recommended services include:

• Proton Drive — full end-to-end encryption
• Tresorit
• pCloud (Crypto Folder option)
• com
• iCloud with Advanced Data Protection

Standard services such as Google Drive or Dropbox are safer when additional encryption is used.

5. Secure the smartphone itself

Even the best storage practices won’t help if the phone itself isn’t protected.

Use:

• a strong PIN (6–8 digits) or long password instead of a simple pattern lock
• biometric authentication (fingerprint or face recognition)
• remote device wipe features like
  • Find My Device
  • Find My iPhone

Also set automatic screen lock to 1 minute or less.

Additional precautions

• Install apps only from official stores (Google Play or App Store)
• Keep your system and apps updated
• Review app permissions, especially access to photos or files
• Avoid suspicious links and public Wi-Fi networks without a VPN

Quick security checklist

For maximum protection:

• Remove all document scans from the gallery
• Place documents in an encrypted archive
• Store the archive in a secure folder or encrypted cloud
• Enable two-factor authentication for cloud accounts
• Use a strong PIN/password + biometrics
• Enable remote wipe in case the phone is lost

In brief

Sensitive documents such as passports, ID cards, and bank details should never be stored directly in the smartphone gallery. The safest approach is encrypted archives stored in a secure phone folder or end-to-end encrypted cloud storage like Proton Drive or Tresorit. Combined with strong passwords, biometrics, two-factor authentication, and remote device wiping, these steps dramatically reduce the risk of data exposure even if your phone is lost, stolen, or hacked.