COS is billed on a pay-as-you-go basis. For more information, see Billing Overview.
A COS bill is broken down into five items: storage usage, requests, data retrievals, traffic, and management feature. For more information on COS billing and pricing, see Billable Items and Product Pricing.
We provide all first-time COS users (both individuals and enterprises) with a limited free tier for STANDARD storage usage. For more information, see Free Tier.
Possible reasons include:
Public network downstream traffic is traffic generated by data transfer from COS to the client over the Internet. Traffic generated by downloading an object directly through an object link or by browsing an object through a static website access node is public network downstream traffic. For more information on billing for such traffic, see Billable Items and Product Pricing.
It may be because you are still using a COS endpoint formatted as
<BucketName-APPID>.cos.<region>.myqcloud.com to access COS files after you enabled CDN acceleration. We recommend that you use your CDN acceleration domain name instead, which only generates CDN origin-pull traffic.
CDN origin-pull traffic is traffic generated by data transfer from COS to a Tencent Cloud CDN edge server. After CDN acceleration is enabled, traffic generated by browsing or downloading COS data in the client through CDN acceleration domain is CDN origin-pull traffic. For more information on billing for such traffic, see Billing Overview and Product Pricing.
There are charges for traffic when data transfer happens between COS and CVM from different regions, and no such charges if in the same region (free for data transfer over private network). For more information, see How to determine an access over private network.
All requests generated by data transfer between CVM and COS will be billed.
No, they won’t.
Tencent Cloud products within the same region access each other over the private network by default, with no traffic fees incurred. For more information, see How to determine an access over private network.
You can view your COS bills through the Billing Center in the console. For more information, see Viewing Billing Details.
If so, you cannot read or write any data to COS. All you can do using the console is top up your account. For more information, see Arrears.