docs/docs/en/file-manager/storage/tencent-cos.md
A storage engine based on Tencent Cloud COS. You need to prepare the relevant account and permissions before use.
:::warning Note
This engine does not support private access. After a file is uploaded, NocoBase generates a directly accessible URL, and anyone who has that URL can access the file.
Even if the COS bucket itself is private, the built-in Tencent COS engine does not generate temporary signed URLs for file access. If you need private access, use S3 Pro. If historical files already exist, see Migrate to S3 Pro.
:::
:::info{title=Note} This section only introduces the specific parameters for the Tencent Cloud COS storage engine. For general parameters, please refer to General Engine Parameters. :::
Enter the region for COS storage, for example: ap-chengdu.
:::info{title=Note} You can view the region information of your bucket in the Tencent Cloud COS Console. You only need to use the region prefix (not the full domain name). :::
Enter the ID of your Tencent Cloud access key.
Enter the Secret of your Tencent Cloud access key.
Enter the name of the COS bucket, for example: qing-cdn-1234189398.