Hi everyone. Welcome to the 5th chapter in our Tencent Cloud SysOps associate course, data storage deployment practices. At the end of this chapter you'll be able to understand various Cloud storage products and their functions and learn how to manage the configuration of these storage products. In this chapter, we'll cover two sections, object storage configuration and file storage configuration. This video we'll cover the first section , object storage configuration. A subsequent video will cover the remaining section. Let's get started with Section 1. Object storage configuration. In this video, we'll cover an overview of Cloud object storage, the Cloud object storage configuration process, creating a bucket, creating folders, uploading objects, downloading objects, deleting objects, deleting folders and buckets, and the COSBrowser client tool. Let's go over Cloud object storage, starting with some basic concepts. Buckets are used to store objects in COS while objects are the basic unit of storage. The region is the COS data center location where objects are stored. An APPID is associated with a bucket name so that it is universally identifiable. There is also a default object address that can be used to access the objects in COS. Now let's look at how a bucket works and how to create, delete, upload, and download objects on the Tencent Cloud console. The basic processes of Cloud Object Storage consist of creating and deleting buckets and folders, and uploading, downloading, and deleting objects. To create a bucket, log in to the COS console and navigate to the bucket list. Click "Create Bucket" and fill in the bucket name, region, access permissions, and endpoint in the ensuing dialog pop-up. When creating a bucket, you can set hotlink protection for a bucket. You can either set a block list which will deny endpoint access to all domain names on this list or an allow list which will only allow endpoint access to domain names on this list. A maximum of 10 addresses including domain names and IPs are supported. Remember that objects are the basic unit of storage in Tencent Cloud COS and are stored in a bucket. Object keys are the unique identifiers for an object in a bucket. These keys can only contain letters, numbers or characters, and must not contain any special characters. The object address is composed of the bucket endpoint and the object key. When creating a folder and uploading objects, keep in mind that there are object quantity and size limits, also keep in mind that you can resume broken transfers, delete incomplete multi-part uploads, or clear buckets to increase COS performance. Before creating an object, you need to create a new folder to store the object. You can create a folder in the Tencent Cloud COS console. Folder names are limited to 255 characters and reserved characters and fields are not supported. To upload an object, first log in to the Tencent Cloud COS console, navigate to Bucket List and click on File List. Select the object to upload and set the object's properties. Make sure that the upload has completed before moving on. To download an object you can set an ACL. There are two types of object permissions; public permissions and user privileges. Public permissions include inherited permissions, private read and write, and public read and private write. For user privileges, the primary account has all object privileges by default. COS also supports adding sub accounts with data read, data write, permission read, permission write, and fully controlling the highest permissions. There are two methods of searching for the object to download, searching for an object in the current bucket and searching for an object in multilevel folders. Now let's look at viewing the object information and downloading the object. The object information includes the object name, object size, and last modified date. To download the object, first click on Download to the right of the selected object. Next select a single object and click ''Download'' in the more actions drop-down list. Finally, click ''Details'' to the write of the object and you can either click ''Download Object'' or ''Copy Temporary Link'' to download the object. To delete a single object, first enter the bucket list, select the object to delete and click ''Delete'', then click ''OK'' to confirm the object deletion. Note that the data cannot be recovered after deletion unless you have enabled version control. To delete a bucket, first find the bucket you want to delete on the COS console. Make sure you delete any folders in the bucket before you proceed. Then find the bucket in the bucket list and click ''Delete'', click ''OK'' in the dialog popup box to confirm the deletion of the bucket. Tencent Cloud COS has separate visual interface tools for both desktop and mobile devices, including a client tool called COSBrowser. You can use COSBrowser to easily view transfer and manage resources. After downloading and installing COSBrowser, you can log in and perform various operations such as upload, download, rename, delete, add, and copy and paste.