Tencent Cloud COS
Plan snapshot
Tencent Cloud COS
TRIALPAYCARD
- Free storage / trial
- New COS users receive 50 GB Standard storage usage for 6 months.
- Separate limits
- Free quota applies to Standard storage in eligible public cloud regions; traffic and operations can still matter.
- Billing trigger
- Requires Tencent Cloud account activation; pay-as-you-go after free quota/time window.
- Best fit
- S3-compatible object storage in Tencent regions during a generous six-month trial window.
Cost hygiene:Set reminders before the 180-day free quota expires and avoid assuming traffic is included with storage.
Checked 2026-05-13: Tencent COS free tier
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:
text
mybucket-1250000000The endpoint format is:
text
https://cos.{region}.myqcloud.comHow to Connect
- Open AeroFTP.
- Select Tencent Cloud COS from the S3 provider presets.
- Enter your SecretId in the access key field.
- Enter your SecretKey in the secret key field.
- Enter the full bucket name, including the APPID suffix.
- Select the COS region.
- 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 |