diff --git a/bin/quickstart.sh b/bin/quickstart.sh
--- a/bin/quickstart.sh
+++ b/bin/quickstart.sh
@@ -24,6 +24,7 @@
 docker volume rm kolab_mariadb || :
 docker volume rm kolab_imap || :
 docker volume rm kolab_ldap || :
+docker volume rm kolab_minio || :
 
 # We can't use the following artisan commands because it will just block if redis is unavailable:
 # src/artisan octane:stop >/dev/null 2>&1 || :
@@ -34,7 +35,7 @@
 
 bin/regen-certs
 docker-compose build coturn ldap kolab mariadb meet pdns proxy redis haproxy roundcube
-docker-compose up -d coturn ldap kolab mariadb meet pdns redis roundcube
+docker-compose up -d coturn ldap kolab mariadb meet pdns redis roundcube minio
 
 # Workaround until we have docker-compose --wait (https://github.com/docker/compose/pull/8777)
 function wait_for_container {
diff --git a/config.demo/src/.env b/config.demo/src/.env
--- a/config.demo/src/.env
+++ b/config.demo/src/.env
@@ -194,3 +194,7 @@
 PASSPORT_PROXY_OAUTH_CLIENT_ID=942edef5-3dbd-4a14-8e3e-d5d59b727bee
 PASSPORT_PROXY_OAUTH_CLIENT_SECRET=L6L0n56ecvjjK0cJMjeeV1pPAeffUBO0YSSH63wf
 
+MINIO_USER=minio
+MINIO_PASSWORD=W3lcom32@ph3lia
+MINIO_BUCKET=kolab
+FILESYSTEM_DISK=minio
diff --git a/config.prod/src/.env b/config.prod/src/.env
--- a/config.prod/src/.env
+++ b/config.prod/src/.env
@@ -151,3 +151,8 @@
 
 OPENEXCHANGERATES_API_KEY={{ openexchangerates_api_key }}
 FIREBASE_API_KEY={{ firebase_api_key }}
+
+MINIO_USER=minio
+MINIO_PASSWORD=W3lcom32@ph3lia
+MINIO_BUCKET=kolab
+FILESYSTEM_DISK=minio
diff --git a/docker-compose.yml b/docker-compose.yml
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -337,6 +337,29 @@
       - ./meet/server:/src/meet/:ro
       - ./docker/certs/meet.${APP_WEBSITE_DOMAIN}.cert:/etc/pki/tls/certs/meet.${APP_WEBSITE_DOMAIN}.cert
       - ./docker/certs/meet.${APP_WEBSITE_DOMAIN}.key:/etc/pki/tls/private/meet.${APP_WEBSITE_DOMAIN}.key
+  minio:
+    container_name: kolab-minio
+    restart: on-failure
+    healthcheck:
+      interval: 10s
+      test: "curl -f http://127.0.0.1:9000/minio/health/live || exit 1"
+      timeout: 5s
+      retries: 30
+      start_period: 5m
+    environment:
+      - MINIO_ROOT_USER=${MINIO_USER}
+      - MINIO_ROOT_PASSWORD=${MINIO_PASSWORD}
+    image: minio/minio
+    networks:
+      kolab:
+        ipv4_address: 172.18.0.14
+    ports:
+      - "9000:9000"
+      - "9001:9001"
+    entrypoint: sh
+    command: -c 'mkdir -p /data/${MINIO_BUCKET} && minio server /data --console-address ":9001"'
+    volumes:
+      - minio:/data
 networks:
   kolab:
     driver: bridge
@@ -347,3 +370,4 @@
   mariadb:
   imap:
   ldap:
+  minio:
diff --git a/src/app/Backends/Storage.php b/src/app/Backends/Storage.php
--- a/src/app/Backends/Storage.php
+++ b/src/app/Backends/Storage.php
@@ -25,7 +25,7 @@
      */
     public static function fileDelete(Item $file): void
     {
-        $disk = LaravelStorage::disk('files');
+        $disk = LaravelStorage::disk(\config('filesystems.default'));
 
         $path = $file->path . '/' . $file->id;
 
@@ -45,7 +45,7 @@
      */
     public static function fileChunkDelete(Chunk $chunk): void
     {
-        $disk = LaravelStorage::disk('files');
+        $disk = LaravelStorage::disk(\config('filesystems.default'));
 
         $path = self::chunkLocation($chunk->chunk_id, $chunk->item);
 
@@ -79,7 +79,7 @@
 
         $response->setCallback(function () use ($file) {
             $file->chunks()->orderBy('sequence')->get()->each(function ($chunk) use ($file) {
-                $disk = LaravelStorage::disk('files');
+                $disk = LaravelStorage::disk(\config('filesystems.default'));
                 $path = Storage::chunkLocation($chunk->chunk_id, $file);
 
                 $stream = $disk->readStream($path);
@@ -108,7 +108,7 @@
             return self::fileInputResumable($stream, $params, $file);
         }
 
-        $disk = LaravelStorage::disk('files');
+        $disk = LaravelStorage::disk(\config('filesystems.default'));
 
         $chunkId = \App\Utils::uuidStr();
 
@@ -197,8 +197,8 @@
             throw new \Exception("Invalid 'from' parameter for resumable file upload.");
         }
 
-        $disk = LaravelStorage::disk('files');
 
+        $disk = LaravelStorage::disk(\config('filesystems.default'));
         $chunkId = \App\Utils::uuidStr();
 
         $path = self::chunkLocation($chunkId, $file);
@@ -266,7 +266,7 @@
      */
     protected static function mimetype(string $path): string
     {
-        $disk = LaravelStorage::disk('files');
+        $disk = LaravelStorage::disk(\config('filesystems.default'));
 
         $mimetype = $disk->mimeType($path);
 
diff --git a/src/composer.json b/src/composer.json
--- a/src/composer.json
+++ b/src/composer.json
@@ -26,6 +26,7 @@
         "laravel/octane": "^1.2",
         "laravel/passport": "^11.3",
         "laravel/tinker": "^2.7",
+        "league/flysystem-aws-s3-v3": "^3.0",
         "mlocati/spf-lib": "^3.1",
         "mollie/laravel-mollie": "^2.19",
         "pear/crypt_gpg": "^1.6.6",
diff --git a/src/config/filesystems.php b/src/config/filesystems.php
--- a/src/config/filesystems.php
+++ b/src/config/filesystems.php
@@ -52,6 +52,16 @@
             'visibility' => 'public',
         ],
 
+        'minio' => [
+            'driver' => 's3',
+            'key' => env('MINIO_USER'),
+            'secret' => env('MINIO_PASSWORD'),
+            'region' => 'local',
+            'bucket' => env('MINIO_BUCKET'),
+            'endpoint' => 'http://minio:9000',
+            'use_path_style_endpoint' => true,
+        ],
+
         's3' => [
             'driver' => 's3',
             'key' => env('AWS_ACCESS_KEY_ID'),