You can at any time delete files you do not need in Bucket to avoid costs of storage capacity according to the below action process:
1.Enter Object Storage Service console and then space management; click the bucket you need to access in the space list; after that, click Object Management:
2.Find the file to be deleted and click Delete:
3.Click Delete and then a notification asking confirmation to delete pops up; click OK to delete; files is unrecoverable after deletion.