The Problem

When deploying a .NET MAUI (or Xamarin) Android application to a physical device or emulator, you may hit this error:

ADB0060: Mono.AndroidTools.InsufficientSpaceException: There is not enough storage space on the device to store package: /data/local/tmp/com.rubberduckdev.simpleinvoice-Signed.apk. Free up some space and try again.

Each time Visual Studio deploys your app it pushes the signed APK to /data/local/tmp/ on the device. Over repeated debug sessions these files accumulate and eventually exhaust the available space in that partition.

The Fix

The solution is straightforward — delete the stale temporary files from the device using adb shell.

Attempt 1: adb in PATH

Your first instinct might be to run:

adb shell rm -rf /data/local/tmp/*

But on many Windows development machines, adb is not on the system PATH, so you will see:

adb: The term 'adb' is not recognized as a name of a cmdlet, function, script file,
or executable program.
Check the spelling of the name, or if a path was included, verify that the path is
correct and try again.

Attempt 2: Use the full SDK path

The Android SDK installed by Visual Studio or the .NET MAUI workload lives under your local AppData folder. You can invoke adb.exe directly:

& "$env:LOCALAPPDATA\Android\Sdk\platform-tools\adb.exe" shell rm -rf /data/local/tmp/*

This clears out every temporary file that was pushed to the device. After running it, re-deploy your app and the ADB0060 error should be gone.

Adding adb to PATH permanently

If you find yourself running adb commands often, add the platform-tools directory to your user PATH so the short form works everywhere:

$sdkTools = "$env:LOCALAPPDATA\Android\Sdk\platform-tools"
[Environment]::SetEnvironmentVariable(
    "Path",
    [Environment]::GetEnvironmentVariable("Path", "User") + ";$sdkTools",
    "User"
)

Restart your terminal after running the above, and adb will be recognised directly.

Conclusion

This is a quick note-to-self post. The ADB0060 InsufficientSpaceException is caused by leftover APKs filling up /data/local/tmp/ on the device. A single adb shell rm command clears the space and gets you back to deploying. If you hit this regularly, adding the platform-tools folder to your PATH saves a few keystrokes each time.