Tencent Cloud COS

Tencent Cloud COS is Tencent's S3-compatible object storage platform. AeroFTP includes a dedicated Tencent Cloud COS preset so the regional endpoint pattern is handled consistently.

Why Use AeroFTP with Tencent Cloud COS

• desktop bucket access without manually composing S3 requests
• regional endpoint handling for China, Asia-Pacific, Europe, and US regions
• saved connection profiles for repeat upload, backup, and sync workflows
• one client for COS, Alibaba Cloud OSS, AWS S3, and other object storage providers

What You Need

• your Tencent SecretId
• your Tencent SecretKey
• your bucket name including the APPID suffix
• the region where the bucket is hosted

Bucket Naming and Endpoint Format

Tencent Cloud COS buckets usually include the APPID suffix, for example:

mybucket-1250000000

The endpoint format is:

https://cos.{region}.myqcloud.com

How to Connect

1. Open AeroFTP.
2. Select Tencent Cloud COS from the S3 provider presets.
3. Enter your SecretId in the access key field.
4. Enter your SecretKey in the secret key field.
5. Enter the full bucket name, including the APPID suffix.
6. Select the COS region.
7. Connect and save the profile.

Recommended Defaults

• use the dedicated Tencent Cloud COS preset
• keep the selected region aligned to the bucket region in Tencent Cloud
• do not remove the APPID suffix from the bucket name

Common Issues

Problem	Cause	Solution
Bucket not found	Missing APPID suffix in bucket name	Re-enter the full bucket name exactly as shown in Tencent Cloud
Signature mismatch	Wrong region	Re-select the region and retry
Access denied	SecretId or SecretKey lacks COS permissions	Verify the CAM policy attached to the key
Empty listing	Connected to the wrong bucket or prefix	Double-check the bucket name and top-level path

Related Documentation

• S3-Compatible Storage
• Provider Reference