diff --git a/.gitignore b/.gitignore
index 0d7dbff3..1f876f7f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -42,3 +42,5 @@ out/
 /tomcat/
 /tomcat-e2e/
 /e2eTest.log
+/files/test-media-29599b059-06e1-49eb-91b8-1405244e57ce.png
+/files/thumbnail-test-media-29599b059-06e1-49eb-91b8-1405244e57ce.png
diff --git a/src/test/kotlin/dev/usbharu/hideout/core/service/media/LocalFileSystemMediaDataStoreTest.kt b/src/test/kotlin/dev/usbharu/hideout/core/service/media/LocalFileSystemMediaDataStoreTest.kt
new file mode 100644
index 00000000..e2854912
--- /dev/null
+++ b/src/test/kotlin/dev/usbharu/hideout/core/service/media/LocalFileSystemMediaDataStoreTest.kt
@@ -0,0 +1,121 @@
+package dev.usbharu.hideout.core.service.media
+
+import dev.usbharu.hideout.application.config.ApplicationConfig
+import dev.usbharu.hideout.application.config.LocalStorageConfig
+import kotlinx.coroutines.test.runTest
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.jupiter.api.Test
+import java.net.URL
+import java.nio.file.Path
+import java.util.*
+import kotlin.io.path.readBytes
+import kotlin.io.path.toPath
+
+class LocalFileSystemMediaDataStoreTest {
+
+    private val path = String.javaClass.classLoader.getResource("400x400.png")?.toURI()?.toPath()!!
+
+    @Test
+    fun `save inputStreamを使用して正常に保存できる`() = runTest {
+        val applicationConfig = ApplicationConfig(URL("https://example.com"))
+        val storageConfig = LocalStorageConfig("files", null)
+
+        val localFileSystemMediaDataStore = LocalFileSystemMediaDataStore(applicationConfig, storageConfig)
+
+        val fileInputStream = path.readBytes()
+
+        assertThat(fileInputStream.size).isNotEqualTo(0)
+
+        val mediaSave = MediaSave(
+            "test-media-1${UUID.randomUUID()}.png",
+            "",
+            fileInputStream,
+            fileInputStream
+        )
+
+        val save = localFileSystemMediaDataStore.save(mediaSave)
+
+        assertThat(save).isInstanceOf(SuccessSavedMedia::class.java)
+
+        save as SuccessSavedMedia
+
+        assertThat(Path.of("files").toAbsolutePath().resolve(save.name))
+            .exists()
+            .hasSize(fileInputStream.size.toLong())
+        assertThat(Path.of("files").toAbsolutePath().resolve("thumbnail-" + save.name))
+            .exists()
+            .hasSize(fileInputStream.size.toLong())
+    }
+
+    @Test
+    fun 一時ファイルを使用して正常に保存できる() = runTest {
+        val applicationConfig = ApplicationConfig(URL("https://example.com"))
+        val storageConfig = LocalStorageConfig("files", null)
+
+        val localFileSystemMediaDataStore = LocalFileSystemMediaDataStore(applicationConfig, storageConfig)
+
+        val fileInputStream = path.readBytes()
+
+        assertThat(fileInputStream.size).isNotEqualTo(0)
+
+        val saveRequest = MediaSaveRequest(
+            "test-media-2${UUID.randomUUID()}.png",
+            "",
+            path,
+            path
+        )
+
+        val save = localFileSystemMediaDataStore.save(saveRequest)
+
+        assertThat(save).isInstanceOf(SuccessSavedMedia::class.java)
+
+        save as SuccessSavedMedia
+
+        assertThat(Path.of("files").toAbsolutePath().resolve(save.name))
+            .exists()
+            .hasSize(fileInputStream.size.toLong())
+        assertThat(Path.of("files").toAbsolutePath().resolve("thumbnail-" + save.name))
+            .exists()
+            .hasSize(fileInputStream.size.toLong())
+    }
+
+    @Test
+    fun idを使用して削除できる() = runTest {
+        val applicationConfig = ApplicationConfig(URL("https://example.com"))
+        val storageConfig = LocalStorageConfig("files", null)
+
+        val localFileSystemMediaDataStore = LocalFileSystemMediaDataStore(applicationConfig, storageConfig)
+
+        val fileInputStream = path.readBytes()
+
+        assertThat(fileInputStream.size).isNotEqualTo(0)
+
+        val saveRequest = MediaSaveRequest(
+            "test-media-2${UUID.randomUUID()}.png",
+            "",
+            path,
+            path
+        )
+
+        val save = localFileSystemMediaDataStore.save(saveRequest)
+
+        assertThat(save).isInstanceOf(SuccessSavedMedia::class.java)
+
+        save as SuccessSavedMedia
+
+        assertThat(Path.of("files").toAbsolutePath().resolve(save.name))
+            .exists()
+            .hasSize(fileInputStream.size.toLong())
+        assertThat(Path.of("files").toAbsolutePath().resolve("thumbnail-" + save.name))
+            .exists()
+            .hasSize(fileInputStream.size.toLong())
+
+
+        localFileSystemMediaDataStore.delete(save.name)
+
+        assertThat(Path.of("files").toAbsolutePath().resolve(save.name))
+            .doesNotExist()
+        assertThat(Path.of("files").toAbsolutePath().resolve("thumbnail-" + save.name))
+            .doesNotExist()
+    }
+}