Who this policy covers
Stratum: Pro File Manager (“Stratum,” “we,” “the app”) is developed by PortableCreator. This policy explains what data the app accesses on your device and how it is handled.
What Stratum accesses
- Files and folders on your device's storage, which you browse, copy, move, rename, or delete using the app's normal file-management features.
- Network server details you configure yourself (SMB, SFTP, FTP) — hostname, port, username, and password or SSH key — solely to connect to servers you choose.
- The list of installed apps on your device, used only to power the in-app Apps screen and one-tap APK backup feature.
What Stratum does not do
- Stratum does not collect, transmit, or sell any personal data to us or to any third party. There is no analytics SDK, no advertising SDK, and no crash-reporting SDK in the app.
- Stratum does not upload your files anywhere. Files only move between locations you explicitly choose (for example, copying a file to a network server you configured).
- Network server credentials are encrypted on-device using the Android Keystore and are never transmitted anywhere except to the server you configured them for.
The encrypted Vault
Files you choose to import into Stratum's Vault feature are encrypted on-device with AES-256-GCM, using a hardware-backed key in the Android Keystore, unlocked with your device's biometric or PIN authentication.
Vault files are never decrypted to shared storage — a temporary copy is created only in memory when you open a file, and it is wiped immediately after use.
Permissions
| Permission | Why Stratum needs it |
|---|---|
MANAGE_EXTERNAL_STORAGE(All Files Access) |
Required for Stratum's core function — browsing and managing files anywhere on your device's storage, not just app-specific folders. |
POST_NOTIFICATIONS(Notifications) |
Used only to show progress for copy/move/extract operations. Optional. |
QUERY_ALL_PACKAGES(Installed apps list) |
Used only for the Apps screen and APK backup feature. |
INTERNET / network state |
Used only to connect to network servers you configure yourself (SMB/SFTP/FTP), and for the local HTTP proxy that streams network media to players on your own device. |
Data retention
All app data (settings, saved network connections, Vault contents) is stored locally on your device. Uninstalling the app removes all of it. We do not operate any server that stores your data.
Changes to this policy
If this policy changes, the “Last updated” date at the top of this page will be revised.
Contact
Questions about this policy or about Stratum's data handling: portablecreator@gmail.com