Transform your USB drive into a private, secure data vault

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lumin

What is Lumin?

Lumin is a free personal mobile data security app that lets you manage USB drives directly from your phone.
It automatically encrypts and backs up your photos, videos, and files to a USB drive using a “one-file, one-key” encryption mechanism—so even if the USB drive is lost, your data remains completely safe.

What Can Lumin Do?

🔐 True File-Level Security with “One File, One Key”

  • Every file is encrypted with an independent random key

  • No “single master password” risk

  • Even if one file key is compromised, all other files remain safe

  • Supports high-strength AES encryption

Security is not a slogan—it’s built into the design.

📸 Automatic Encrypted Backup for Photos & Videos

  • Automatically scans photos and videos on your phone

  • One-tap to enable “Auto Encrypted Backup”

  • New files are encrypted and backed up automatically

  • Supports incremental backup

You focus on capturing life. Lumi takes care of security.

🔓 Decrypt Anytime When You Need

  • Decrypt encrypted files from the USB drive back to your phone

  • Batch export supported

  • Flexible options: view only, or restore to original files

Total control, whenever you need it.

📱 Direct Phone-to-USB Connection – No Computer Needed

  • Supports OTG direct connection to USB drives

  • No computer or internet required

  • Plug and play

  • Encrypt, decrypt, and browse files entirely on your phone

Phone + USB Drive = Your Portable Encrypted Storage Center

🗂 Browse Encrypted Files Without Decrypting

You can directly:

  • View encrypted photos

  • Play encrypted videos

  • Open encrypted documents

All without decrypting to your phone—
private viewing, zero risk of leakage.

🌐 One Account, Access Across Multiple Devices

  • Log into the same account on different phones or tablets

  • Securely access encrypted files on your USB drive

  • Data travels with you, not with a device

  • No data migration needed when switching phones

One account. Multiple devices. Same secure data.

Why Choose Lumin?

Feature Lumi Traditional Cloud Storage
Data under your control ✔ ✘
Internet required ✘ ✔
Reliance on third-party servers ✘ ✔
Data safe if USB is lost ✔ ✘
Offline usage ✔ ✘

Real-World Use Cases

Protect Personal Photos and Privacy

Don’t want to store private photos on cloud services?
Worried about data being exposed if your phone is lost?

With Lumi:

Take photos → Auto encrypt → Backup to USB

Even if your phone or USB drive is lost,
no one can access your private data.

Carry Important Files Securely

Contracts, IDs, designs, study materials…

  • Storing them on your phone feels risky

  • Uploading to the cloud feels unsafe

  • Saving to USB alone feels unreliable

Lumi helps you:

Turn any ordinary USB drive into a secure encrypted vault.

Expand Your Phone Storage Safely

Running out of phone space?

  • Encrypt and store large videos directly to USB

  • Free up phone storage

  • View files anytime you need

  • No need to buy cloud storage

More space. Lower cost. Better security.

Use the Same Data Across Devices

  • Switch phones without hassle

  • Use multiple devices with the same USB drive

  • Just plug in and access encrypted files

Your data follows you, not your device.

Lumin’s Mission

Give ordinary USB drives bank-level security

Make personal data protection simple for everyone

Help users build their own private, secure data space

Security made simple—this is Lumin.

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