diff --git a/app/build.gradle b/app/build.gradle
index 864fd88..04216c3 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,16 +1,20 @@
 plugins {
     id 'com.android.application'
     id 'org.jetbrains.kotlin.android'
+    id "com.google.dagger.hilt.android"
+    id 'kotlinx-serialization'
+    id "kotlin-kapt"
+    id 'com.google.protobuf' version '0.9.4'
 }
 
 android {
     namespace 'be.re.writand'
-    compileSdk 33
+    compileSdk 34
 
     defaultConfig {
         applicationId "be.re.writand"
-        minSdk 24
-        targetSdk 33
+        minSdk 26
+        targetSdk 34
         versionCode 1
         versionName "1.0"
 
@@ -27,37 +31,92 @@ android {
         }
     }
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
     }
     kotlinOptions {
-        jvmTarget = '1.8'
+        jvmTarget = '17'
     }
     buildFeatures {
         compose true
     }
     composeOptions {
-        kotlinCompilerExtensionVersion '1.2.0'
+        kotlinCompilerExtensionVersion '1.5.0'
     }
     packagingOptions {
         resources {
             excludes += '/META-INF/{AL2.0,LGPL2.1}'
         }
     }
+    testOptions {
+        unitTests.all {
+            useJUnitPlatform()
+        }
+        unitTests.returnDefaultValues = true
+    }
 }
 
 dependencies {
-
-    implementation 'androidx.core:core-ktx:1.7.0'
-    implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.3.1'
-    implementation 'androidx.activity:activity-compose:1.3.1'
+    implementation 'androidx.core:core-ktx:1.13.1'
+    implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.8.3'
+    implementation 'androidx.activity:activity-compose:1.9.0'
     implementation "androidx.compose.ui:ui:$compose_ui_version"
     implementation "androidx.compose.ui:ui-tooling-preview:$compose_ui_version"
-    implementation 'androidx.compose.material:material:1.2.0'
+    implementation 'androidx.compose.material:material:1.6.8'
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.1.5'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
+
+    // Testing
     androidTestImplementation "androidx.compose.ui:ui-test-junit4:$compose_ui_version"
+    testImplementation "org.junit.jupiter:junit-jupiter-api:5.8.1"
+    testRuntimeOnly "org.junit.jupiter:junit-jupiter-engine:5.8.1"
+
+    // Mockito testing
+    testImplementation "org.mockito.kotlin:mockito-kotlin:3.2.0"
+    testImplementation "org.robolectric:robolectric:3.4.2"
+    testImplementation 'org.powermock:powermock-api-mockito:1.4.12'
+    testImplementation 'org.powermock:powermock-module-junit4:1.6.2'
+
+    testImplementation "org.mockito:mockito-core:4.2.0"
+    testImplementation "org.mockito:mockito-inline:4.1.0"
+    testImplementation "org.mockito:mockito-android:4.1.0"
+
+    // Hilt
+    implementation "com.google.dagger:hilt-android:2.48"
+    kapt "com.google.dagger:hilt-compiler:2.48"
+
+    // Room
+    implementation 'androidx.room:room-runtime:2.6.1'
+    annotationProcessor 'androidx.room:room-compiler:2.6.1'
+    implementation 'androidx.room:room-ktx:2.6.1'
+
+    // Proto DataStore
+    implementation 'androidx.datastore:datastore:1.1.1'
+    implementation 'com.google.protobuf:protobuf-javalite:3.21.7'
+
     debugImplementation "androidx.compose.ui:ui-tooling:$compose_ui_version"
     debugImplementation "androidx.compose.ui:ui-test-manifest:$compose_ui_version"
+}
+
+kapt {
+    correctErrorTypes true
+}
+
+protobuf {
+    protoc {
+        artifact = "com.google.protobuf:protoc:3.21.7"
+    }
+// Generates the java Protobuf-lite code for the Protobufs in this project.
+// see https://github.com/google/protobuf-gradle-plugin#customizing-protobuf-compilation
+// for more information.
+    generateProtoTasks {
+        all().each { task ->
+            task.builtins {
+                java {
+                    option 'lite'
+                }
+            }
+        }
+    }
 }
\ No newline at end of file
diff --git a/app/src/main/java/be/re/writand/data/local/db/ProjectEntity.kt b/app/src/main/java/be/re/writand/data/local/db/ProjectEntity.kt
new file mode 100644
index 0000000..6ccf42e
--- /dev/null
+++ b/app/src/main/java/be/re/writand/data/local/db/ProjectEntity.kt
@@ -0,0 +1,19 @@
+package be.re.writand.data.local.db
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+import be.re.writand.data.local.models.OpenFilePath
+
+/**
+ * Entity for recent projects to keep in memory, used in the ProjectsDAO.
+ * @param[id] the unique id of a project.
+ * @param[path] the absolute path to the directory/file.
+ * A file in case of a project consisting of 1 file only.
+ * @param[openedFiles] a list of objects to specify more about each last opened file.
+ */
+@Entity(tableName = "projects")
+data class ProjectEntity (
+    @PrimaryKey val id: Int,
+    val path: String,
+    val openedFiles: List<OpenFilePath>
+)
\ No newline at end of file
diff --git a/app/src/main/java/be/re/writand/data/local/db/ProjectsDao.kt b/app/src/main/java/be/re/writand/data/local/db/ProjectsDao.kt
new file mode 100644
index 0000000..ce54be0
--- /dev/null
+++ b/app/src/main/java/be/re/writand/data/local/db/ProjectsDao.kt
@@ -0,0 +1,37 @@
+package be.re.writand.data.local.db
+
+import androidx.room.Dao
+import androidx.room.Delete
+import androidx.room.Insert
+import androidx.room.Query
+import be.re.writand.data.local.models.Project
+import kotlinx.coroutines.flow.Flow
+
+/**
+ * A DAO to handle recent opened projects when the Project Picker is presented.
+ */
+@Dao
+interface ProjectsDao {
+
+    /**
+     * Get all the recent files that were opened.
+     */
+    @Query("SELECT * FROM projects")
+    fun getAllProjects(): Flow<List<Project>>
+
+    /**
+     * Insert a project into the database that was just opened.
+     * @param[project] the project to add in the database.
+     */
+    @Insert(entity = ProjectEntity::class)
+    suspend fun insertProject(project: Project)
+
+    /**
+     * Delete a project from the recent opened projects.
+     * Should be called when the limit of saving projects is reached.
+     * @param[project] the project to be deleted from the database.
+     */
+    @Delete(entity = ProjectEntity::class)
+    suspend fun deleteProject(project: Project)
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/be/re/writand/data/local/db/ProjectsDatabase.kt b/app/src/main/java/be/re/writand/data/local/db/ProjectsDatabase.kt
new file mode 100644
index 0000000..2b2c57e
--- /dev/null
+++ b/app/src/main/java/be/re/writand/data/local/db/ProjectsDatabase.kt
@@ -0,0 +1,25 @@
+package be.re.writand.data.local.db
+
+import android.content.Context
+import androidx.room.Database
+import androidx.room.Room
+import androidx.room.RoomDatabase
+
+/**
+ * Database for all the recent projects.
+ */
+@Database(entities = [ProjectEntity::class], version = 1)
+abstract class ProjectsDatabase: RoomDatabase() {
+
+    abstract fun projectsDao(): ProjectsDao
+
+    companion object {
+        @Volatile private var instance: ProjectsDatabase? = null
+
+        fun getInstance(context: Context) = instance ?: synchronized(this) {
+            return Room.databaseBuilder(
+                context.applicationContext, ProjectsDatabase::class.java, "projects-db"
+            ).build().also { instance = it }
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/be/re/writand/data/local/models/.keep b/app/src/main/java/be/re/writand/data/local/models/.keep
deleted file mode 100644
index e69de29..0000000
diff --git a/app/src/main/java/be/re/writand/data/local/models/Project.kt b/app/src/main/java/be/re/writand/data/local/models/Project.kt
new file mode 100644
index 0000000..063eb24
--- /dev/null
+++ b/app/src/main/java/be/re/writand/data/local/models/Project.kt
@@ -0,0 +1,16 @@
+package be.re.writand.data.local.models
+
+/**
+ * Data class used in the ProjectsDAO to store information about a recent project.
+ * @param[id] a unique id for the project.
+ * @param[path] the absolute path to the directory/file location of the project.
+ */
+data class Project(val id: Int, val path: String)
+
+/**
+ * Data class used in ProjectEntity to store information about a recent file of a project.
+ * @param[projectId] the id of the project the file belongs to.
+ * @param[path] the relative path to the file starting from the root fo the project.
+ * @param[isSaved] info whether the file was saved before closing the app (for expansion of unsaved files).
+ */
+data class OpenFilePath(val projectId: Int, val path: String, var isSaved: Boolean)
\ No newline at end of file
diff --git a/app/src/main/java/be/re/writand/data/repos/.keep b/app/src/main/java/be/re/writand/data/repos/.keep
deleted file mode 100644
index e69de29..0000000
diff --git a/app/src/main/java/be/re/writand/data/repos/IProjectsRepository.kt b/app/src/main/java/be/re/writand/data/repos/IProjectsRepository.kt
new file mode 100644
index 0000000..d29344e
--- /dev/null
+++ b/app/src/main/java/be/re/writand/data/repos/IProjectsRepository.kt
@@ -0,0 +1,29 @@
+package be.re.writand.data.repos
+
+import be.re.writand.data.local.models.Project
+import kotlinx.coroutines.flow.Flow
+
+
+/**
+ * Repository that handles everything for the local ProjectsDatabase.
+ * @param[dao] the dao provides get/add/delete functionality of the recent projects.
+ */
+interface IProjectsRepository {
+
+    /**
+     * Gets all the projects from the local storage.
+     */
+    fun getAllProjects(): Flow<List<Project>>
+
+    /**
+     * Adds a project to the local storage of recent projects.
+     * @param[project] the project to be added to the database.
+     */
+    suspend fun addProject(project: Project)
+
+    /**
+     * Deletes a project from the local storage of recent projects.
+     * @param[project] the project to be deleted from the database.
+     */
+    suspend fun deleteProject(project: Project)
+}
\ No newline at end of file
diff --git a/app/src/main/java/be/re/writand/data/repos/ProjectsRepository.kt b/app/src/main/java/be/re/writand/data/repos/ProjectsRepository.kt
new file mode 100644
index 0000000..d8b6671
--- /dev/null
+++ b/app/src/main/java/be/re/writand/data/repos/ProjectsRepository.kt
@@ -0,0 +1,23 @@
+package be.re.writand.data.repos
+
+import be.re.writand.data.local.db.ProjectsDao
+import be.re.writand.data.local.models.Project
+import kotlinx.coroutines.flow.Flow
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class ProjectsRepository @Inject constructor(private val dao: ProjectsDao): IProjectsRepository {
+
+    override fun getAllProjects(): Flow<List<Project>> {
+        return dao.getAllProjects()
+    }
+
+    override suspend fun addProject(project: Project) {
+        dao.insertProject(project)
+    }
+
+    override suspend fun deleteProject(project: Project) {
+        dao.deleteProject(project)
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/be/re/writand/di/.keep b/app/src/main/java/be/re/writand/di/.keep
deleted file mode 100644
index e69de29..0000000
diff --git a/app/src/main/java/be/re/writand/di/DatabaseModule.kt b/app/src/main/java/be/re/writand/di/DatabaseModule.kt
new file mode 100644
index 0000000..1b321e2
--- /dev/null
+++ b/app/src/main/java/be/re/writand/di/DatabaseModule.kt
@@ -0,0 +1,29 @@
+package be.re.writand.di
+
+import android.content.Context
+import be.re.writand.data.local.db.ProjectsDao
+import be.re.writand.data.local.db.ProjectsDatabase
+import dagger.Module
+import dagger.Provides
+import dagger.hilt.InstallIn
+import dagger.hilt.android.qualifiers.ApplicationContext
+import dagger.hilt.components.SingletonComponent
+import javax.inject.Singleton
+
+/**
+ * Module necessary to enable dependency injection for databases and DAO's.
+ */
+@InstallIn(SingletonComponent::class)
+@Module
+class DatabaseModule {
+    @Singleton
+    @Provides
+    fun provideProjectsDatabase(@ApplicationContext context: Context): ProjectsDatabase {
+        return ProjectsDatabase.getInstance(context)
+    }
+    @Provides
+    fun provideQuotesDao(projectsDatabase: ProjectsDatabase): ProjectsDao {
+        return projectsDatabase.projectsDao()
+    }
+
+}
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index 29c5abd..343fae8 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,10 +1,13 @@
 buildscript {
     ext {
-        compose_ui_version = '1.2.0'
+        kotlin_version = '1.9.0'
+        compose_ui_version = '1.6.8'
     }
 }// Top-level build file where you can add configuration options common to all sub-projects/modules.
 plugins {
-    id 'com.android.application' version '7.4.2' apply false
-    id 'com.android.library' version '7.4.2' apply false
-    id 'org.jetbrains.kotlin.android' version '1.7.0' apply false
+    id 'com.android.application' version '8.5.1' apply false
+    id 'com.android.library' version '8.5.1' apply false
+    id 'org.jetbrains.kotlin.android' version '1.9.0' apply false
+    id 'com.google.dagger.hilt.android' version '2.44' apply false
+    id 'org.jetbrains.kotlin.plugin.serialization' version '1.6.21'
 }
\ No newline at end of file
diff --git a/gradle.properties b/gradle.properties
index 3c5031e..f19c7b9 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -20,4 +20,5 @@ kotlin.code.style=official
 # Enables namespacing of each library's R class so that its R class includes only the
 # resources declared in the library itself and none from the library's dependencies,
 # thereby reducing the size of the R class for that library
-android.nonTransitiveRClass=true
\ No newline at end of file
+android.nonTransitiveRClass=true
+android.nonFinalResIds=false
\ No newline at end of file
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 559eff6..bc9a016 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 #Tue Jul 16 09:37:51 CEST 2024
 distributionBase=GRADLE_USER_HOME
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.5-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.7-bin.zip
 distributionPath=wrapper/dists
 zipStorePath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME