diff --git a/API/Controllers/DTOs/Author.cs b/API/Controllers/DTOs/Author.cs
index 0e2403b..a7b0999 100644
--- a/API/Controllers/DTOs/Author.cs
+++ b/API/Controllers/DTOs/Author.cs
@@ -6,7 +6,7 @@ namespace API.Controllers.DTOs;
 /// <summary>
 /// The <see cref="API.Schema.MangaContext.Author"/> DTO
 /// </summary>
-public record Author(string Key, string Name) : Identifiable(Key)
+public sealed record Author(string Key, string Name) : Identifiable(Key)
 {
     /// <summary>
     /// Name of the Author.
diff --git a/API/Controllers/DTOs/Chapter.cs b/API/Controllers/DTOs/Chapter.cs
index aab2860..f7ec832 100644
--- a/API/Controllers/DTOs/Chapter.cs
+++ b/API/Controllers/DTOs/Chapter.cs
@@ -6,7 +6,7 @@ namespace API.Controllers.DTOs;
 /// <summary>
 /// <see cref="API.Schema.MangaContext.Chapter"/> DTO
 /// </summary>
-public record Chapter(string Key, string MangaId, int? Volume, string ChapterNumber, string? Title, IEnumerable<MangaConnectorId> MangaConnectorIds, bool Downloaded) : Identifiable(Key)
+public sealed record Chapter(string Key, string MangaId, int? Volume, string ChapterNumber, string? Title, IEnumerable<MangaConnectorId> MangaConnectorIds, bool Downloaded) : Identifiable(Key)
 {
     /// <summary>
     /// Identifier of the Manga this Chapter belongs to
diff --git a/API/Controllers/DTOs/FileLibrary.cs b/API/Controllers/DTOs/FileLibrary.cs
new file mode 100644
index 0000000..a8d9960
--- /dev/null
+++ b/API/Controllers/DTOs/FileLibrary.cs
@@ -0,0 +1,14 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace API.Controllers.DTOs;
+
+public sealed record FileLibrary(string Key, string BasePath, string LibraryName) : Identifiable(Key)
+{
+    [StringLength(256)]
+    [Required]
+    public string BasePath { get; internal set; } = BasePath;
+
+    [StringLength(512)]
+    [Required]
+    public string LibraryName { get; internal set; } = LibraryName;
+}
\ No newline at end of file
diff --git a/API/Controllers/DTOs/Manga.cs b/API/Controllers/DTOs/Manga.cs
index 76bd34e..f37e40e 100644
--- a/API/Controllers/DTOs/Manga.cs
+++ b/API/Controllers/DTOs/Manga.cs
@@ -7,7 +7,7 @@ namespace API.Controllers.DTOs;
 /// <summary>
 /// <see cref="Schema.MangaContext.Manga"/> DTO
 /// </summary>
-public record Manga(string Key, string Name, string Description, MangaReleaseStatus ReleaseStatus, IEnumerable<MangaConnectorId> MangaConnectorIds, float IgnoreChaptersBefore, uint? Year, string? OriginalLanguage, IEnumerable<string> ChapterIds, IEnumerable<Author> Authors, IEnumerable<string> Tags, IEnumerable<Link> Links, IEnumerable<AltTitle> AltTitles, string? FileLibraryId)
+public sealed record Manga(string Key, string Name, string Description, MangaReleaseStatus ReleaseStatus, IEnumerable<MangaConnectorId> MangaConnectorIds, float IgnoreChaptersBefore, uint? Year, string? OriginalLanguage, IEnumerable<string> ChapterIds, IEnumerable<Author> Authors, IEnumerable<string> Tags, IEnumerable<Link> Links, IEnumerable<AltTitle> AltTitles, string? FileLibraryId)
     : MinimalManga(Key, Name, Description, ReleaseStatus, MangaConnectorIds)
 {
     /// <summary>
diff --git a/API/Controllers/FileLibraryController.cs b/API/Controllers/FileLibraryController.cs
index fba8910..69e9ee0 100644
--- a/API/Controllers/FileLibraryController.cs
+++ b/API/Controllers/FileLibraryController.cs
@@ -4,6 +4,8 @@ using Microsoft.AspNetCore.Http.HttpResults;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.EntityFrameworkCore;
 using static Microsoft.AspNetCore.Http.StatusCodes;
+using FileLibrary = API.Controllers.DTOs.FileLibrary;
+
 // ReSharper disable InconsistentNaming
 
 namespace API.Controllers;
@@ -14,18 +16,21 @@ namespace API.Controllers;
 public class FileLibraryController(MangaContext context) : Controller
 {
     /// <summary>
-    /// Returns all <see cref="FileLibrary"/>
+    /// Returns all <see cref="DTOs.FileLibrary"/>
     /// </summary>
     /// <response code="200"></response>
     /// <response code="500">Error during Database Operation</response>
     [HttpGet]
-    [ProducesResponseType<FileLibrary[]>(Status200OK, "application/json")]
+    [ProducesResponseType<List<FileLibrary>>(Status200OK, "application/json")]
     [ProducesResponseType(Status500InternalServerError)]
     public async Task<Results<Ok<List<FileLibrary>>, InternalServerError>> GetFileLibraries ()
     {
         if (await context.FileLibraries.ToListAsync(HttpContext.RequestAborted) is not { } result)
             return TypedResults.InternalServerError();
-        return TypedResults.Ok(result);
+
+        List<FileLibrary> fileLibraries = result.Select(f => new FileLibrary(f.Key, f.BasePath, f.LibraryName)).ToList();
+
+        return TypedResults.Ok(fileLibraries);
     }
 
     /// <summary>
@@ -42,7 +47,7 @@ public class FileLibraryController(MangaContext context) : Controller
         if(await context.FileLibraries.FirstOrDefaultAsync(l => l.Key == FileLibraryId, HttpContext.RequestAborted) is not { } library)
             return TypedResults.NotFound(nameof(FileLibraryId));
         
-        return TypedResults.Ok(library);
+        return TypedResults.Ok(new FileLibrary(library.Key, library.BasePath, library.LibraryName));
     }
 
     /// <summary>
@@ -98,15 +103,16 @@ public class FileLibraryController(MangaContext context) : Controller
     /// <summary>
     /// Creates new <see cref="FileLibrary"/>
     /// </summary>
-    /// <param name="library">New <see cref="FileLibrary"/> to add</param>
+    /// <param name="requestData">New <see cref="FileLibrary"/> to add</param>
     /// <response code="200">Key of new Library</response>
     /// <response code="500">Error during Database Operation</response>
     [HttpPut]
     [ProducesResponseType<string>(Status201Created, "text/plain")]
     [ProducesResponseType<string>(Status500InternalServerError, "text/plain")]
-    public async Task<Results<Created<string>, InternalServerError<string>>> CreateNewLibrary ([FromBody]FileLibrary library)
+    public async Task<Results<Created<string>, InternalServerError<string>>> CreateNewLibrary ([FromBody]CreateLibraryRecord requestData)
     {
         //TODO Parameter check
+        Schema.MangaContext.FileLibrary library = new Schema.MangaContext.FileLibrary(requestData.BasePath, requestData.LibraryName);
         context.FileLibraries.Add(library);
         
         if(await context.Sync(HttpContext.RequestAborted) is { success: false } result)
@@ -114,6 +120,7 @@ public class FileLibraryController(MangaContext context) : Controller
         
         return TypedResults.Created(string.Empty, library.Key);
     }
+    public sealed record CreateLibraryRecord(string BasePath, string LibraryName);
     
     /// <summary>
     /// Deletes the <see cref="FileLibraryId"/>.LibraryName with <paramref name="FileLibraryId"/>