On Android smartphones and tablets equipped with microSD expandable storage slots, managing internal storage capacity is critical—especially on budget or mid-tier hardware with 64GB or 128GB of internal memory. However, when users navigate to Settings > Apps and attempt to move large games, navigation maps, or media apps to an installed high-speed microSD card, the “Storage used: Change” button is frequently missing or greyed out.
This limitation is not a hardware restriction; rather, it is dictated by third-party application developers who declare android:installLocation="internalOnly" inside their application’s XML manifest file. Fortunately, Android includes a master override switch built directly into Developer Options: Force allow apps on external. When enabled, Android disregards developer manifest restrictions and makes all apps eligible for external storage transfer. This guide explains how to enable and use this feature safely.
Enabling Developer Options on Android
- Open Settings on your Android device.
- Scroll to the bottom and select About phone.
- Locate Build number and tap it repeatedly seven times.
- Confirm your PIN or fingerprint pattern when prompted until you see: “You are now a developer!”
Enabling Force Allow Apps on External
- Return to the main Settings menu.
- Navigate to System > Developer options (on some skins, located under Additional settings).
- Scroll down to the Apps category near the bottom of the list.
- Locate the toggle labeled Force allow apps on external.
- Switch the toggle to ON.
- Restart your Android smartphone to ensure system package manager services reinitialize with the updated storage policy.
Moving Restricted Applications to MicroSD Storage
Once the developer toggle is active:
- Open Settings > Apps > See all apps.
- Select the storage-heavy app you wish to migrate (e.g. large offline games or streaming players).
- Tap Storage & cache.
- You will now see an active Storage used section with a Change button.
- Tap Change, select your SD Card, and confirm by tapping Move.
Performance and Operational Considerations
| Factor | Internal UFS Storage | MicroSD Card Storage |
|---|---|---|
| Read / Write Speeds | Blazing fast (UFS 2.2 / 3.1 / 4.0 up to 4000 MB/s) | Slower (A1 / A2 rated microSD up to 100–160 MB/s) |
| App Launch Time | Instantaneous | Slight delay on resource-intensive games |
| Card Removal Impact | None | Apps stored on external card become temporarily unavailable |
| Best Practice | System apps, banking apps, core widgets | Large offline games, video editors, media caches |