Formatting an SD card as internal storage is a feature available in some Android devices, but it's important to note that not all versions of Android or all devices support this feature. Here's a general guide on how to format an SD card as internal storage on a compatible Android device:

1. Insert SD Card: Ensure your SD card is inserted into your Android device.

2. Open Settings: Go to the Settings app on your device.

3. Navigate to Storage: Look for the "Storage" or "Storage & USB" option in the Settings menu. This might be under "Device" or "Storage" depending on your device and Android version.

4. Select SD Card: Find your SD card from the list of storage options. It should be listed separately from your device's internal storage.

5. Format as Internal Storage: Tap on the SD card option, then look for an option similar to "Format as internal" or "Format as internal storage". This option may also be labeled as "Use as internal storage" depending on your Android version.

6. Follow Prompts: You'll likely be prompted to confirm that you want to format the SD card. This process will erase all data currently on the SD card, so ensure you have backed up any important data.

7. Wait for Formatting: The device will begin formatting the SD card. This process may take several minutes depending on the size of the SD card.

8. Restart if Prompted: After formatting, you may be prompted to restart your device for the changes to take effect. Follow any on-screen instructions.

Please note:

• Compatibility: Not all Android devices support formatting an SD card as internal storage. Some manufacturers disable this feature or it may not be available on older versions of Android.
• Performance: While formatting as internal storage can expand your device's storage capacity for apps and data, it may impact performance compared to using the device's built-in storage.

If you do not see the option to format the SD card as internal storage in your device's settings, it likely means that your device does not support this feature. In such cases, you may still be able to manually move some apps and data to the SD card as described earlier, though certain apps and data may not be movable. For specific guidance tailored to your device model and Android version, consulting the device's user manual or the manufacturer's support resources can provide more detailed instructions.