Added Blob Storing section.

docs/en/Blob-Storing.md

@@ -0,0 +1,3 @@
+# Blog Storing
+
+TODO

docs/en/Blog-Posts/2020-06-05 v2_9_Release/Post.md

@@ -14,4 +14,70 @@ You do nothing to get the benefit of the new system. [Overriding UI pages/compon
 
 ### New Blob Storing Package
 
-We've
+We've created a new [Blob Storing package](https://www.nuget.org/packages/Volo.Abp.BlobStoring) to store arbitrary binary object. It is generally used to store files in your application. This package provides an abstraction, so any application or [module](https://docs.abp.io/en/abp/latest/Module-Development-Basics) can save and retrieve files independent from the actual storing provider.
+
+There are two storing provider currently implemented:
+
+* [Volo.Abp.BlobStoring.FileSystem](https://www.nuget.org/packages/Volo.Abp.BlobStoring.FileSystem) package stores objects/files in the local file system with a configured folder.
+* [Volo.Abp.BlobStoring.Database](https://github.com/abpframework/abp/tree/dev/modules/blob-storing-database) module stores objects/files in a database. It currently supports [Entity Framework Core](https://docs.abp.io/en/abp/latest/Entity-Framework-Core) (so, you can use [any relational DBMS](https://docs.abp.io/en/abp/latest/Entity-Framework-Core-Other-DBMS)) and [MongoDB](https://docs.abp.io/en/abp/latest/MongoDB).
+
+[Azure BLOB provider](https://github.com/abpframework/abp/issues/4098) will be available with v3.0. You can request other cloud providers or contribute yourself on the [GitHub repository](https://github.com/abpframework/abp/issues/new).
+
+One of the benefit of the blob storing system it allows you to create multiple containers (each container is a blob storage) and use different storing providers for each container.
+
+**Example: Use the default container to save and get a byte array**
+
+````csharp
+public class MyService : ITransientDependency
+{
+    private readonly IBlobContainer _container;
+
+    public MyService(IBlobContainer container)
+    {
+        _container = container;
+    }
+
+    public async Task FooAsync()
+    {
+        //Save a BLOB
+        byte[] bytes = GetBytesFromSomeWhere();
+        await _container.SaveAsync("my-unique-blob-name", bytes);
+        
+        //Retrieve a BLOB
+        bytes = await _container.GetAllBytesAsync("my-unique-blob-name");
+    }
+}
+````
+
+It can work with `byte[]` and `Stream` objects.
+
+**Example: Use a typed (named) container to save and get a stream**
+
+````csharp
+public class MyService : ITransientDependency
+{
+    private readonly IBlobContainer<TestContainer1> _container;
+
+    public MyService(IBlobContainer<TestContainer1> container)
+    {
+        _container = container;
+    }
+
+    public async Task FooAsync()
+    {
+        //Save a BLOB
+        Stream stream = GetStreamFromSomeWhere();
+        await _container.SaveAsync("my-unique-blob-name", stream);
+        
+        //Retrieve a BLOB
+        stream = await _container.GetAsync("my-unique-blob-name");
+    }
+}
+````
+
+A typed (named) container can be configured to use a different storing provider than the default one. It is a good practice to always use a typed container while developing re-usable modules, so the final application can configure provider for this container without effecting the other containers.
+
+
+
+See the blob storing documentation for more information.
+