Why do I still owe fees (deductions) when I enjoy the free quota of COS?

When you're enjoying the free quota of Tencent Cloud Object Storage (COS), there are several reasons why you might still incur fees or deductions:

1. Exceeding Free Quota: The most common reason is exceeding the limits of the free tier. Each month, COS offers a certain amount of storage, requests, and data transfer for free. Once you exceed these limits, you'll be charged according to the standard rates.

   • Example: If the free tier allows for 5GB of storage and you store 6GB, you'll be charged for the additional 1GB.

2. Data Transfer: Even within the free tier, data transfer out (egress) is often limited. Any data transferred out beyond the free limit will incur charges.

   • Example: If the free tier includes 1GB of data transfer out per month and you transfer out 1.5GB, you'll be charged for the extra 0.5GB.

3. Request Fees: Some operations, like deleting objects, can incur request fees, which might not be fully covered by the free tier.

   • Example: Deleting a large number of objects might result in request fees if the free tier's request limit is exceeded.

4. Storage Lifecycle Policies: If you have set up lifecycle policies to transition data to cheaper storage classes or delete it after a certain period, these transitions or deletions might incur costs depending on the policies and the amount of data involved.

5. Cross-Region Replication: If you have enabled cross-region replication, this service might incur additional costs based on the amount of data replicated and the regions involved.

To avoid unexpected charges, it's important to monitor your usage closely and adjust your storage and data transfer practices accordingly. Tencent Cloud provides detailed billing information and alerts to help you manage your costs effectively.

For more advanced features and better cost management, consider exploring Tencent Cloud's various services and plans that offer more flexibility and control over your cloud resources.