diff --git a/modules/cms-kit/src/Volo.CmsKit.Domain.Shared/Volo/CmsKit/MediaDescriptors/MediaDescriptorConsts.cs b/modules/cms-kit/src/Volo.CmsKit.Domain.Shared/Volo/CmsKit/MediaDescriptors/MediaDescriptorConsts.cs
new file mode 100644
index 0000000000..5f4741828e
--- /dev/null
+++ b/modules/cms-kit/src/Volo.CmsKit.Domain.Shared/Volo/CmsKit/MediaDescriptors/MediaDescriptorConsts.cs
@@ -0,0 +1,11 @@
+namespace Volo.CmsKit.MediaDescriptors
+{
+    public class MediaDescriptorConsts
+    {
+        public static int MaxNameLength { get; set; } = 255;
+        
+        public static int MaxMimeTypeLength { get; set; } = 128;
+
+        public static int MaxSizeLength = int.MaxValue;
+    }
+}
\ No newline at end of file
diff --git a/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/Medias/Extensions/MediaDescriptorExtensions.cs b/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/MediaDescriptors/Extensions/MediaDescriptorExtensions.cs
similarity index 90%
rename from modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/Medias/Extensions/MediaDescriptorExtensions.cs
rename to modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/MediaDescriptors/Extensions/MediaDescriptorExtensions.cs
index 579affbd02..a1fa903d55 100644
--- a/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/Medias/Extensions/MediaDescriptorExtensions.cs
+++ b/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/MediaDescriptors/Extensions/MediaDescriptorExtensions.cs
@@ -1,7 +1,7 @@
 using System.IO;
 using System.Linq;
 
-namespace Volo.CmsKit.Medias.Extensions
+namespace Volo.CmsKit.MediaDescriptors.Extensions
 {
     public static class MediaDescriptorExtensions
     {
diff --git a/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/Medias/IMediaDescriptorRepository.cs b/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/MediaDescriptors/IMediaDescriptorRepository.cs
similarity index 80%
rename from modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/Medias/IMediaDescriptorRepository.cs
rename to modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/MediaDescriptors/IMediaDescriptorRepository.cs
index 552c840897..f9f003b6c3 100644
--- a/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/Medias/IMediaDescriptorRepository.cs
+++ b/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/MediaDescriptors/IMediaDescriptorRepository.cs
@@ -1,7 +1,7 @@
 using System;
 using Volo.Abp.Domain.Repositories;
 
-namespace Volo.CmsKit.Medias
+namespace Volo.CmsKit.MediaDescriptors
 {
     public interface IMediaDescriptorRepository : IBasicRepository<MediaDescriptor, Guid>
     {
diff --git a/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/Medias/InvalidMediaDescriptorNameException.cs b/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/MediaDescriptors/InvalidMediaDescriptorNameException.cs
similarity index 93%
rename from modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/Medias/InvalidMediaDescriptorNameException.cs
rename to modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/MediaDescriptors/InvalidMediaDescriptorNameException.cs
index 376c221cd1..0634448fa2 100644
--- a/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/Medias/InvalidMediaDescriptorNameException.cs
+++ b/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/MediaDescriptors/InvalidMediaDescriptorNameException.cs
@@ -3,7 +3,7 @@ using System.Runtime.Serialization;
 using JetBrains.Annotations;
 using Volo.Abp;
 
-namespace Volo.CmsKit.Medias
+namespace Volo.CmsKit.MediaDescriptors
 {
     [Serializable]
     public class InvalidMediaDescriptorNameException : BusinessException
diff --git a/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/Medias/MediaContainer.cs b/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/MediaDescriptors/MediaContainer.cs
similarity index 76%
rename from modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/Medias/MediaContainer.cs
rename to modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/MediaDescriptors/MediaContainer.cs
index d1bb7a76da..bbb4a41327 100644
--- a/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/Medias/MediaContainer.cs
+++ b/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/MediaDescriptors/MediaContainer.cs
@@ -1,6 +1,6 @@
 using Volo.Abp.BlobStoring;
 
-namespace Volo.CmsKit.Medias
+namespace Volo.CmsKit.MediaDescriptors
 {
     [BlobContainerName("cms-kit-medias")]
     public class MediaContainer
diff --git a/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/Medias/MediaDescriptor.cs b/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/MediaDescriptors/MediaDescriptor.cs
similarity index 79%
rename from modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/Medias/MediaDescriptor.cs
rename to modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/MediaDescriptors/MediaDescriptor.cs
index 78bc42119d..5041e20c8a 100644
--- a/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/Medias/MediaDescriptor.cs
+++ b/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/MediaDescriptors/MediaDescriptor.cs
@@ -1,9 +1,10 @@
 using System;
+using Volo.Abp;
 using Volo.Abp.Domain.Entities.Auditing;
 using Volo.Abp.MultiTenancy;
-using Volo.CmsKit.Medias.Extensions;
+using Volo.CmsKit.MediaDescriptors.Extensions;
 
-namespace Volo.CmsKit.Medias
+namespace Volo.CmsKit.MediaDescriptors
 {
     public class MediaDescriptor : FullAuditedAggregateRoot<Guid>, IMultiTenant
     {
@@ -23,7 +24,8 @@ namespace Volo.CmsKit.Medias
         public MediaDescriptor(Guid id, Guid? tenantId, string name, string mimeType, int size) : base(id)
         {
             TenantId = tenantId;
-            MimeType = mimeType;
+            
+            MimeType = Check.NotNullOrWhiteSpace(mimeType, nameof(name), MediaDescriptorConsts.MaxMimeTypeLength);
             Size = size;
             
             SetName(name);