# Uploading a File or Folder

#### Background Information

Files are uploaded in multiparts on OBS Browser. OBS Browser supports the upload of a single file with the maximum size of 48.8 TB.

OBS Browser supports resumable transfer. If the upload task is suspended or fails, restart the task. According to the part information recorded in the task, the successfully uploaded parts will not be uploaded again, and other parts will be requested for uploading.

#### Procedure

1. Log in to OBS Browser.
2. Click the bucket to which the file or folder will be uploaded.
3. Click Upload. The Upload Object dialog box is displayed. For details, see Figure 1.

   You can select either files or folders to upload. For details, see 4 and 5.

   Figure 1 Uploading objects
4. Click Select File. The local file browser dialog box is displayed. Select the file that you want to upload and click Open.

   You can upload a maximum of 500 files or folders at a time.

   If the files that you want to upload to OBS are stored in Microsoft OneDrive, it is recommended that the names of these files contain a maximum of 32 characters to ensure compatibility.

5. Click Select Folder, select a folder, and click OK.
6. Select a storage class. If no storage class is selected, the object inherits the bucket storage class by default.
7. Click OK to upload the file or folder.

#### Related Operations

You can modify the storage class of the object after uploading the file or folder.

1. Log in to OBS Browser.
2. In the bucket list, click the bucket name.
3. Select the target object and choose More > Change Storage Class on the right.
4. Select the desired storage class and click OK.
5. In the displayed dialog box, click Close to close the dialog box.

- Objects can be changed from Standard to Warm or Cold storage class, or from Warm to Standard or Cold storage class, but objects in Cold storage class must be restored before being changed to Standard or Warm storage class. Changing from Warm or Cold to other storage classes incurs restoration fees. Select an appropriate change option based on your actual needs.
- When the storage class is changed to Cold, the object restoration status changes to Unrestored.
- You can also configure a lifecycle rule to change the storage class of an object. For details, see Lifecycle Management Overview.

Parent topic: Managing Objects