First Version. Hardcoded Model Name only tested on the Legion Go

App.xaml

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+<?xml version="1.0" encoding="utf-8"?>
+<Application xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+    <Application.Resources>
+        <ResourceDictionary>
+            <Style x:Key="BaseTextBlockStyle" TargetType="TextBlock" />
+            <ResourceDictionary.MergedDictionaries>                
+                <ResourceDictionary Source="Localization/en_US.xaml" />
+            </ResourceDictionary.MergedDictionaries>
+        </ResourceDictionary>
+    </Application.Resources>
+</Application>

Localization/en_US.xaml

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+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
+                    xmlns:sys="clr-namespace:System;assembly=mscorlib">
+
+</ResourceDictionary>

MicroSDInstallStatusUpdater.cs

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+using Playnite.SDK;
+using Playnite.SDK.Events;
+using Playnite.SDK.Models;
+using Playnite.SDK.Plugins;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Management;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Windows.Controls;
+
+namespace MicroSDInstallStatusUpdater
+{
+    public class MicroSDInstallStatusUpdater : GenericPlugin
+    {
+        private static readonly ILogger logger = LogManager.GetLogger();
+
+        private MicroSDInstallStatusUpdaterSettingsViewModel settings { get; set; }
+
+        public override Guid Id { get; } = Guid.Parse("216a1883-0794-4381-b5e3-8ccf42ad1463");
+
+        public MicroSDInstallStatusUpdater(IPlayniteAPI api) : base(api)
+        {
+            settings = new MicroSDInstallStatusUpdaterSettingsViewModel(this);
+            Properties = new GenericPluginProperties
+            {
+                HasSettings = false
+            };
+        }
+
+        public override void OnApplicationStarted(OnApplicationStartedEventArgs args)
+        {
+            var insertWatcher = new ManagementEventWatcher(new WqlEventQuery(
+                      "__InstanceCreationEvent", new TimeSpan(0, 0, 1),
+                      "TargetInstance isa 'Win32_DiskDrive' AND TargetInstance.Model LIKE '%SDXC Card%'"));
+            insertWatcher.EventArrived += SDCardInserted;
+            logger.Info("[SDCardInstallStatusUpdater] SDCard Insert Watcher Registered!");
+
+            var removeWatcher = new ManagementEventWatcher(new WqlEventQuery(
+                "__InstanceDeletionEvent", new TimeSpan(0, 0, 1),
+                "TargetInstance isa 'Win32_DiskDrive' AND TargetInstance.Model LIKE '%SDXC Card%'"));
+            removeWatcher.EventArrived += SDCardRemoved;
+            logger.Info("[SDCardInstallStatusUpdater] SDCard Remove Watcher Registered!");
+            logger.Info("[SDCardInstallStatusUpdater] SDCard Watc");
+
+            insertWatcher.Start();
+            removeWatcher.Start();
+        }
+
+        private void SDCardRemoved(object sender, EventArrivedEventArgs e)
+        {
+            logger.Info("[SDCardInstallStatusUpdater] SDCard Removed! Updating Database!");
+            foreach (var game in PlayniteApi.Database.Games)
+            {
+                var InstallDir = game.InstallDirectory;
+
+                if (!Directory.Exists(InstallDir) || InstallDir == null)
+                {
+                    logger.Info("[SDCardInstallStatusUpdater] Game '" + game.Name + "' is not found anymore. Updateing Status to Uninstalled");
+                    game.IsInstalled = false;
+                    PlayniteApi.Database.Games.Update(game);
+                }
+                if (Directory.Exists(InstallDir))
+                {
+                    logger.Info("[SDCardInstallStatusUpdater] Game '" + game.Name + "' is now found!. Updateing Status to Installed");
+                    game.IsInstalled = true;
+                    PlayniteApi.Database.Games.Update(game);
+                }
+            }
+        }
+
+        private void SDCardInserted(object sender, EventArrivedEventArgs e)
+        {
+            logger.Info("[SDCardInstallStatusUpdater] SDCard Inserted! Sleeping a bit to let Windows handle and mount shit :3 Updating Database!");
+            Thread.Sleep(5000);
+            logger.Info("[SDCardInstallStatusUpdater] Sleep Done! Updating Database!");
+            foreach (var game in PlayniteApi.Database.Games)
+            {
+                var InstallDir = game.InstallDirectory;
+
+                if(!Directory.Exists(InstallDir) || InstallDir == null)
+                {
+                    logger.Info("[SDCardInstallStatusUpdater] Game '" + game.Name + "' is not found anymore. Updateing Status to Uninstalled");
+                    game.IsInstalled = false;
+                    PlayniteApi.Database.Games.Update(game);
+                }
+                if (Directory.Exists(InstallDir))
+                {
+                    logger.Info("[SDCardInstallStatusUpdater] Game '" + game.Name + "' is now found!. Updateing Status to Installed");
+                    game.IsInstalled = true;
+                    PlayniteApi.Database.Games.Update(game);
+                }
+            }
+        }
+
+        public override ISettings GetSettings(bool firstRunSettings)
+        {
+            return settings;
+        }
+
+        public override UserControl GetSettingsView(bool firstRunSettings)
+        {
+            return new MicroSDInstallStatusUpdaterSettingsView();
+        }
+    }
+}

MicroSDInstallStatusUpdater.csproj

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+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{4FDF1E89-5BC3-4C72-8FDA-0D580E7A5D5F}</ProjectGuid>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>MicroSDInstallStatusUpdater</RootNamespace>
+    <AssemblyName>MicroSDInstallStatusUpdater</AssemblyName>
+    <TargetFrameworkVersion>v4.6.2</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <Deterministic>true</Deterministic>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="Playnite.SDK, Version=6.10.0.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>packages\PlayniteSDK.6.10.0\lib\net462\Playnite.SDK.dll</HintPath>
+    </Reference>
+    <Reference Include="PresentationCore" />
+    <Reference Include="PresentationFramework" />
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Management" />
+    <Reference Include="System.Xaml" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Xml" />
+    <Reference Include="WindowsBase" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="MicroSDInstallStatusUpdater.cs" />
+    <Compile Include="MicroSDInstallStatusUpdaterSettings.cs" />
+    <Compile Include="MicroSDInstallStatusUpdaterSettingsView.xaml.cs">
+      <DependentUpon>MicroSDInstallStatusUpdaterSettingsView.xaml</DependentUpon>
+    </Compile>
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="extension.yaml">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+    <None Include="packages.config" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="Localization\*.xaml">
+      <Generator>MSBuild:Compile</Generator>
+      <SubType>Designer</SubType>
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+    <Page Include="App.xaml">
+      <Generator>MSBuild:Compile</Generator>
+      <SubType>Designer</SubType>
+    </Page>
+    <Page Include="MicroSDInstallStatusUpdaterSettingsView.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="icon.png">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+</Project>

MicroSDInstallStatusUpdater.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.8.34212.112
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MicroSDInstallStatusUpdater", "MicroSDInstallStatusUpdater.csproj", "{4FDF1E89-5BC3-4C72-8FDA-0D580E7A5D5F}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{4FDF1E89-5BC3-4C72-8FDA-0D580E7A5D5F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{4FDF1E89-5BC3-4C72-8FDA-0D580E7A5D5F}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{4FDF1E89-5BC3-4C72-8FDA-0D580E7A5D5F}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{4FDF1E89-5BC3-4C72-8FDA-0D580E7A5D5F}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {620DAE38-0360-4A4F-A05E-7FE07CD0E592}
+	EndGlobalSection
+EndGlobal

MicroSDInstallStatusUpdaterSettings.cs

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+using Playnite.SDK;
+using Playnite.SDK.Data;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MicroSDInstallStatusUpdater
+{
+    public class MicroSDInstallStatusUpdaterSettings : ObservableObject
+    {
+        private string option1 = string.Empty;
+        private bool option2 = false;
+        private bool optionThatWontBeSaved = false;
+
+        public string Option1 { get => option1; set => SetValue(ref option1, value); }
+        public bool Option2 { get => option2; set => SetValue(ref option2, value); }
+        // Playnite serializes settings object to a JSON object and saves it as text file.
+        // If you want to exclude some property from being saved then use `JsonDontSerialize` ignore attribute.
+        [DontSerialize]
+        public bool OptionThatWontBeSaved { get => optionThatWontBeSaved; set => SetValue(ref optionThatWontBeSaved, value); }
+    }
+
+    public class MicroSDInstallStatusUpdaterSettingsViewModel : ObservableObject, ISettings
+    {
+        private readonly MicroSDInstallStatusUpdater plugin;
+        private MicroSDInstallStatusUpdaterSettings editingClone { get; set; }
+
+        private MicroSDInstallStatusUpdaterSettings settings;
+        public MicroSDInstallStatusUpdaterSettings Settings
+        {
+            get => settings;
+            set
+            {
+                settings = value;
+                OnPropertyChanged();
+            }
+        }
+
+        public MicroSDInstallStatusUpdaterSettingsViewModel(MicroSDInstallStatusUpdater plugin)
+        {
+            // Injecting your plugin instance is required for Save/Load method because Playnite saves data to a location based on what plugin requested the operation.
+            this.plugin = plugin;
+
+            // Load saved settings.
+            var savedSettings = plugin.LoadPluginSettings<MicroSDInstallStatusUpdaterSettings>();
+
+            // LoadPluginSettings returns null if no saved data is available.
+            if (savedSettings != null)
+            {
+                Settings = savedSettings;
+            }
+            else
+            {
+                Settings = new MicroSDInstallStatusUpdaterSettings();
+            }
+        }
+
+        public void BeginEdit()
+        {
+            // Code executed when settings view is opened and user starts editing values.
+            editingClone = Serialization.GetClone(Settings);
+        }
+
+        public void CancelEdit()
+        {
+            // Code executed when user decides to cancel any changes made since BeginEdit was called.
+            // This method should revert any changes made to Option1 and Option2.
+            Settings = editingClone;
+        }
+
+        public void EndEdit()
+        {
+            // Code executed when user decides to confirm changes made since BeginEdit was called.
+            // This method should save settings made to Option1 and Option2.
+            plugin.SavePluginSettings(Settings);
+        }
+
+        public bool VerifySettings(out List<string> errors)
+        {
+            // Code execute when user decides to confirm changes made since BeginEdit was called.
+            // Executed before EndEdit is called and EndEdit is not called if false is returned.
+            // List of errors is presented to user if verification fails.
+            errors = new List<string>();
+            return true;
+        }
+    }
+}

MicroSDInstallStatusUpdaterSettingsView.xaml

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+<UserControl x:Class="MicroSDInstallStatusUpdater.MicroSDInstallStatusUpdaterSettingsView"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             mc:Ignorable="d"
+             d:DesignHeight="400" d:DesignWidth="600">
+    <StackPanel>
+        <TextBlock Text="Description for Option1:"/>
+        <TextBox Text="{Binding Settings.Option1}"/>
+        <TextBlock Text="Description for Option2:"/>
+        <CheckBox IsChecked="{Binding Settings.Option2}"/>
+    </StackPanel>
+</UserControl>

MicroSDInstallStatusUpdaterSettingsView.xaml.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+
+namespace MicroSDInstallStatusUpdater
+{
+    public partial class MicroSDInstallStatusUpdaterSettingsView : UserControl
+    {
+        public MicroSDInstallStatusUpdaterSettingsView()
+        {
+            InitializeComponent();
+        }
+    }
+}